| Section2 = | Section3 = | Section7 = | Section8 = }} Carbon dioxide (chemical formula CO₂) is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state, as a trace gas at a concentration of 0.039% by volume.

As part of the carbon cycle known as photosynthesis, plants, algae, and cyanobacteria absorb carbon dioxide, light, and water to produce carbohydrate energy for themselves and oxygen as a waste product. But in darkness photosynthesis cannot occur, and during the resultant respiration small amounts of carbon dioxide are produced. Carbon dioxide also is a by-product of combustion; emitted from volcanoes, hot springs, and geysers; and freed from carbonate rocks by dissolution.

, carbon dioxide in the Earth's atmosphere is at a concentration of 392 ppm by volume. Atmospheric concentrations of carbon dioxide fluctuate slightly with the change of the seasons, driven primarily by seasonal plant growth in the Northern Hemisphere. Concentrations of carbon dioxide fall during the northern spring and summer as plants consume the gas, and rise during the northern autumn and winter as plants go dormant, die and decay. Taking all this into account, the concentration of CO₂ grew by about 2 ppm in 2009. Carbon dioxide is a greenhouse gas as it transmits visible light but absorbs strongly in the infrared and near-infrared, before slowly re-emitting the infrared at the same or longer wavelengths as what was absorbed.

Before the advent of human-caused release of carbon dioxide to the atmosphere, concentrations tended to increase with increasing global temperatures, acting as a positive feedback for changes induced by other processes such as orbital cycles. There is a seasonal cycle in CO₂ concentration associated primarily with the Northern Hemisphere growing season.

Carbon dioxide has no liquid state at pressures below . At 1 atmosphere (near mean sea level pressure), the gas deposits directly to a solid at temperatures below and the solid sublimes directly to a gas above −78 °C. In its solid state, carbon dioxide is commonly called dry ice.

CO₂ is an acidic oxide: an aqueous solution turns litmus from blue to pink. It is the anhydride of carbonic acid, an acid which is unstable in aqueous solution, from which it cannot be concentrated. In organisms carbonic acid production is catalysed by the enzyme, carbonic anhydrase.

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CO₂ is toxic in higher concentrations: 1% (10,000 ppm) will make some people feel drowsy. Concentrations of 7% to 10% cause dizziness, headache, visual and hearing dysfunction, and unconsciousness within a few minutes to an hour.

Chemical and physical properties

Carbon dioxide is colorless. At low concentrations, the gas is odorless. At higher concentrations it has a sharp, acidic odor. It can cause asphyxiation and irritation. When inhaled at concentrations much higher than usual atmospheric levels, it can produce a sour taste in the mouth and a stinging sensation in the nose and throat. These effects result from the gas dissolving in the mucous membranes and saliva, forming a weak solution of carbonic acid. This sensation can also occur during an attempt to stifle a burp after drinking a carbonated beverage. Amounts above 5,000 ppm are considered very unhealthy, and those above about 50,000 ppm (equal to 5% by volume) are considered dangerous to animal life.

At standard temperature and pressure, the density of carbon dioxide is around 1.98 kg/m³, about 1.5 times that of air. The carbon dioxide molecule (O=C=O) contains two double bonds and has a linear shape. It has no electrical dipole, and as it is fully oxidized, it is moderately reactive and is non-flammable, but will support the combustion of metals such as magnesium.

Above , carbon dioxide changes directly from a solid phase to a gaseous phase through sublimation, or from gaseous to solid through deposition. Solid carbon dioxide is commonly called "dry ice", a generic trademark. It was first observed in 1825 by the French chemist Charles Thilorier. Dry ice is commonly used as a cooling agent, and it is relatively inexpensive. A convenient property for this purpose is that solid carbon dioxide sublimes directly into the gas phase, leaving no liquid. It can often be found in grocery stores and laboratories and is also used in the shipping industry. The largest non-cooling use for dry ice is blast cleaning.

Liquid carbon dioxide forms only at pressures above 5.1 atm; the triple point of carbon dioxide is about 518 kPa at −56.6 °C (see phase diagram, above). The critical point is 7.38 MPa at 31.1 °C.

Another form of solid carbon dioxide, an amorphous glass-like solid, is known, although not at atmospheric pressure. This form of glass, called ''carbonia'', was produced by supercooling heated CO₂ at extreme pressure (40–48 GPa or about 400,000 atmospheres) in a diamond anvil. This discovery confirmed the theory that carbon dioxide could exist in a glass state similar to other members of its elemental family, like silicon (silica glass) and germanium. Unlike silica and germania glasses, however, carbonia glass is not stable at normal pressures and reverts back to gas when pressure is released.

History

Carbon dioxide was one of the first gases to be described as a substance distinct from air. In the seventeenth century, the Flemish chemist Jan Baptist van Helmont observed that when he burned charcoal in a closed vessel, the mass of the resulting ash was much less than that of the original charcoal. His interpretation was that the rest of the charcoal had been transmuted into an invisible substance he termed a "gas" or "wild spirit" (''spiritus sylvestre'').

The properties of carbon dioxide were studied more thoroughly in the 1750s by the Scottish physician Joseph Black. He found that limestone (calcium carbonate) could be heated or treated with acids to yield a gas he called "fixed air." He observed that the fixed air was denser than air and supported neither flame nor animal life. Black also found that when bubbled through an aqueous solution of lime (calcium hydroxide), it would precipitate calcium carbonate. He used this phenomenon to illustrate that carbon dioxide is produced by animal respiration and microbial fermentation. In 1772, English chemist Joseph Priestley published a paper entitled ''Impregnating Water with Fixed Air'' in which he described a process of dripping sulfuric acid (or ''oil of vitriol'' as Priestley knew it) on chalk in order to produce carbon dioxide, and forcing the gas to dissolve by agitating a bowl of water in contact with the gas. This was the invention of Soda water.

Carbon dioxide was first liquefied (at elevated pressures) in 1823 by Humphry Davy and Michael Faraday. The earliest description of solid carbon dioxide was given by Charles Thilorier, who in 1834 opened a pressurized container of liquid carbon dioxide, only to find that the cooling produced by the rapid evaporation of the liquid yielded a "snow" of solid CO₂.

Isolation and production

Carbon dioxide can be obtained by or from air distillation, however, this method is inefficient. A variety of chemical routes to carbon dioxide are known, such as the reaction between most acids and most metal carbonates. For example, the reaction between hydrochloric acid and calcium carbonate (limestone or chalk) is depicted below:

:

The carbonic acid (H₂CO₃) then decomposes to water and CO₂. Such reactions are accompanied by foaming or bubbling, or both. In industry such reactions are widespread because they can be used to neutralize waste acid streams.

The production of quicklime (CaO), a chemical that has widespread use, from limestone by heating at about 850 °C also produces CO₂: :

The combustion of all carbon-containing fuels, such as methane (natural gas), petroleum distillates (gasoline, diesel, kerosene, propane), but also of coal and wood, will yield carbon dioxide and, in most cases, water. As an example the chemical reaction between methane and oxygen is given below.

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Iron is reduced from its oxides with coke in a blast furnace, producing pig iron and carbon dioxide:

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Yeast metabolizes sugar to produce carbon dioxide and ethanol, also known as alcohol, in the production of wines, beers and other spirits, but also in the production of bioethanol:

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All aerobic organisms produce when they oxidize carbohydrates, fatty acids, and proteins in the mitochondria of cells. The large number of reactions involved are exceedingly complex and not described easily. Refer to (cellular respiration, anaerobic respiration and photosynthesis). Photoautotrophs (i.e. plants, cyanobacteria) use another ''modus operandi'': Plants absorb from the air, and, together with water, react it to form carbohydrates:

: ''n''CO₂ + ''n''O → ()_n + ''n''

Carbon dioxide is soluble in water, in which it spontaneously interconverts between CO₂ and (carbonic acid). The relative concentrations of , and the deprotonated forms (bicarbonate) and (carbonate) depend on the pH. In neutral or slightly alkaline water (pH > 6.5), the bicarbonate form predominates (>50%) becoming the most prevalent (>95%) at the pH of seawater, while in very alkaline water (pH > 10.4) the predominant (>50%) form is carbonate. The bicarbonate and carbonate forms are very soluble, such that air-equilibrated ocean water (mildly alkaline with typical pH = 8.2 – 8.5) contains about 120 mg of bicarbonate per liter.

Industrial production

Industrial carbon dioxide is produced mainly from six processes:

Directly from natural carbon dioxide springs, where it is produced by the action of acidified water on limestone or dolomite.

As a by-product of hydrogen production plants, where methane is converted to CO₂;

From combustion of fossil fuels and wood;

As a by-product of fermentation of sugar in the brewing of beer, whisky and other alcoholic beverages;

From thermal decomposition of limestone, , in the manufacture of lime (Calcium oxide, );

Uses

Carbon dioxide is used by the food industry, the oil industry, and the chemical industry. It is used in many consumer products that require pressurized gas because it is inexpensive and nonflammable, and because it undergoes a phase transition from gas to liquid at room temperature at an attainable pressure of approximately 60 bar (870 psi, 59 atm), allowing far more carbon dioxide to fit in a given container than otherwise would. Life jackets often contain canisters of pressured carbon dioxide for quick inflation. Aluminum capsules of CO₂ are also sold as supplies of compressed gas for airguns, paintball markers, inflating bicycle tires, and for making carbonated water. Rapid vaporization of liquid carbon dioxide is used for blasting in coal mines. High concentrations of carbon dioxide can also be used to kill pests.

Foods

A candy called Pop Rocks is pressurized with carbon dioxide gas at about 40 bar (580 psi). When placed in the mouth, it dissolves (just like other hard candy) and releases the gas bubbles with an audible pop.

Leavening agents produce carbon dioxide to cause dough to rise. Baker's yeast produces carbon dioxide by fermentation of sugars within the dough, while chemical leaveners such as baking powder and baking soda release carbon dioxide when heated or if exposed to acids.

Beverages

Carbon dioxide is used to produce carbonated soft drinks and soda water. Traditionally, the carbonation in beer and sparkling wine came about through natural fermentation, but many manufacturers carbonate these drinks with carbon dioxide recovered from the fermentation process. In the case of bottled and kegged beer, recycled carbon dioxide carbonation is the most common method used. With the exception of British Real Ale, draught beer is usually transferred from kegs in a cold room or cellar to dispensing taps on the bar using pressurized carbon dioxide, sometimes mixed with nitrogen.

Wine making

Carbon dioxide in the form of dry ice is often used in the wine making process to cool down bunches of grapes quickly after picking to help prevent spontaneous fermentation by wild yeasts. The main advantage of using dry ice over regular water ice is that it cools the grapes without adding any additional water that may decrease the sugar concentration in the grape must, and therefore also decrease the alcohol concentration in the finished wine.

Dry ice is also used during the cold soak phase of the wine making process to keep grapes cool. The carbon dioxide gas that results from the sublimation of the dry ice tends to settle to the bottom of tanks because it is heavier than air. The settled carbon dioxide gas creates a hypoxic environment which helps to prevent bacteria from growing on the grapes until it is time to start the fermentation with the desired strain of yeast.

Carbon dioxide is also used to create a hypoxic environment for carbonic maceration, the process used to produce Beaujolais wine.

Carbon dioxide is sometimes used to top up wine bottles or other storage vessels such as barrels to prevent oxidation, though it has the problem that it can dissolve into the wine, making a previously still wine slightly fizzy. For this reason, other gases such as nitrogen or argon are preferred for this process by professional wine makers.

Pneumatic systems

Carbon dioxide is one of the most commonly used compressed gases for pneumatic (pressurized gas) systems in portable pressure tools and combat robots.

Fire extinguisher

Carbon dioxide extinguishes flames, and some fire extinguishers, especially those designed for electrical fires, contain liquid carbon dioxide under pressure. Carbon dioxide extinguishers work well on small flammable liquid and electrical fires, but not on ordinary combustible fires, as it is so dry. Carbon dioxide has also been widely used as an extinguishing agent in fixed fire protection systems for local application of specific hazards and total flooding of a protected space, (National Fire Protection Association Code 12). International Maritime Organization standards also recognize carbon dioxide systems for fire protection of ship holds and engine rooms. Carbon dioxide based fire protection systems have been linked to several deaths, because it does not support life in the concentrations used to extinguish fire (40% or so), however, it is not considered to be toxic to humans. A review of CO₂ systems (Carbon Dioxide as a Fire Suppressant: Examining the Risks, US EPA) identified 51 incidents between 1975 and the date of the report, causing 72 deaths and 145 injuries.

Welding

Carbon dioxide also finds use as an atmosphere for welding, although in the welding arc, it reacts to oxidize most metals. Use in the automotive industry is common despite significant evidence that welds made in carbon dioxide are more brittle than those made in more inert atmospheres, and that such weld joints deteriorate over time because of the formation of carbonic acid. It is used as a welding gas primarily because it is much less expensive than more inert gases such as argon or helium.

When used for MIG welding, CO₂ use is sometimes referred to as MAG welding, for Metal Active Gas, as CO₂ can react at these high temperatures. It tends to produce a hotter puddle than truly inert atmospheres, improving the flow characteristics. Although, this may be due to atmospheric reactions occurring at the puddle site. This is usually the opposite of the desired effect when welding, as it tends to embrittle the site, but may not be a problem for general mild steel welding, where ultimate ductility is not a major concern.

Pharmaceutical and other chemical processing

Liquid carbon dioxide is a good solvent for many lipophilic organic compounds and is used to remove caffeine from coffee. Carbon dioxide has attracted attention in the pharmaceutical and other chemical processing industries as a less toxic alternative to more traditional solvents such as organochlorides. It is used by some dry cleaners for this reason. (See green chemistry.)

Carbon dioxide is used as an ingredient in the production of urea, carbonates and bicarbonates, and sodium salicylate. Carbon dioxide is known to react with Grignard reagents to form carboxylic acids. In a metal carbon dioxide complexes, CO₂ serves as a ligand, which can facilitate the conversion of CO₂ to other chemicals.

Agricultural and biological applications

Plants require carbon dioxide to conduct photosynthesis. Greenhouses may (if of large size, must) enrich their atmospheres with additional CO₂ to sustain and increase plant growth. A photosynthesis-related drop (by a factor less than two) in carbon dioxide concentration in a greenhouse compartment would kill green plants, or, at least, completely stop their growth. At very high concentrations (a factor of 100 or more higher than its atmospheric concentration), carbon dioxide can be toxic to animal life, so raising the concentration to 10,000 ppm (1%) or higher for several hours will eliminate pests such as whiteflies and spider mites in a greenhouse. Carbon dioxide is used in greenhouses as the main carbon source for ''Spirulina'' algae.

In medicine, up to 5% carbon dioxide (130 times the atmospheric concentration) is added to oxygen for stimulation of breathing after apnea and to stabilize the balance in blood.

It has been proposed that carbon dioxide from power generation be bubbled into ponds to grow algae that could then be converted into biodiesel fuel.

Lasers

A common type of industrial gas laser is the carbon dioxide laser.

Oil recovery

Carbon dioxide is used in enhanced oil recovery where it is injected into or adjacent to producing oil wells, usually under supercritical conditions. It acts as both a pressurizing agent and, when dissolved into the underground crude oil, significantly reduces its viscosity, enabling the oil to flow more rapidly through the earth to the removal well. In mature oil fields, extensive pipe networks are used to carry the carbon dioxide to the injection points.

Refrigerant

Liquid and solid carbon dioxide are important refrigerants, especially in the food industry, where they are employed during the transportation and storage of ice cream and other frozen foods. Solid carbon dioxide is called "dry ice" and is used for small shipments where refrigeration equipment is not practical. Solid carbon dioxide is always below −78 °C at regular atmospheric pressure, regardless of the air temperature.

Liquid carbon dioxide (industry nomenclature R744 or R-744) was used as a refrigerant prior to the discovery of R-12 and may enjoy a renaissance due to the fact that r134a contributes to climate change. Its physical properties are highly favorable for cooling, refrigeration, and heating purposes, having a high volumetric cooling capacity. Due to its operation at pressures of up to 130 bar (1880 psi), CO₂ systems require highly resistant components that have already been developed for mass production in many sectors. In automobile air conditioning, in more than 90% of all driving conditions for latitudes higher than 50°, R744 operates more efficiently than systems using R-134a. Its environmental advantages (GWP of 1, non-ozone depleting, non-toxic, non-flammable) could make it the future working fluid to replace current HFCs in cars, supermarkets, hot water heat pumps, among others. Coca-Cola has fielded CO₂-based beverage coolers and the U.S. Army is interested in CO₂ refrigeration and heating technology.

The global automobile industry is expected to decide on the next-generation refrigerant in car air conditioning. CO₂ is one discussed option.(see The Cool War)

Coal bed methane recovery

In enhanced coal bed methane recovery, carbon dioxide is pumped into the coal seam to displace methane.

pH control

Carbon dioxide can be used as a mean of controlling the pH of swimming pools, by continuously adding gas to the water, thus keeping the pH level from rising. Among the advantages of this is the avoidance of handling (more hazardous) acids.

CO₂ is also used in the keeping of reef aquaria, where it is commonly used in calcium reactors to temporarily lower the pH of water being passed over calcium carbonate in order to allow the calcium carbonate to dissolve into the water more freely where it is used by some corals to build their skeleton.

In the Earth's atmosphere

Carbon dioxide in earth's atmosphere is considered a trace gas currently occurring at an average concentration of about 390 parts per million by volume or 591 parts per million by mass. The total mass of atmospheric carbon dioxide is 3.16×10¹⁵ kg (about 3,000 gigatonnes). Its concentration varies seasonally (see graph at right) and also considerably on a regional basis, especially near the ground. In urban areas concentrations are generally higher and indoors they can reach 10 times background levels. Carbon dioxide is a greenhouse gas.

Five hundred million years ago carbon dioxide was 20 times more prevalent than today, decreasing to 4–5 times during the Jurassic period and then slowly declining with a particularly swift reduction occurring 49 million years ago. Human activities such as the combustion of fossil fuels and deforestation have caused the atmospheric concentration of carbon dioxide to increase by about 35% since the beginning of the age of industrialization.

Up to 40% of the gas emitted by some volcanoes during subaerial eruptions is carbon dioxide. It is estimated that volcanoes release about 130–230 million tonnes (145–255 million tons) of CO₂ into the atmosphere each year. Carbon dioxide is also produced by hot springs such as those at the Bossoleto site near Rapolano Terme in Tuscany, Italy. Here, in a bowl-shaped depression of about 100 m diameter, local concentrations of CO₂ rise to above 75% overnight, sufficient to kill insects and small animals, but it warms rapidly when sunlit and the gas is dispersed by convection during the day. Locally high concentrations of CO₂, produced by disturbance of deep lake water saturated with CO₂ are thought to have caused 37 fatalities at Lake Monoun, Cameroon in 1984 and 1700 casualties at Lake Nyos, Cameroon in 1986. Emissions of CO₂ by human activities are currently more than 130 times greater than the quantity emitted by volcanoes, amounting to about 27 billion tonnes per year.

In the oceans

There is about fifty times as much carbon dissolved in the sea water of the oceans in the form of CO₂ and carbonic acid, bicarbonate and carbonate ions as exists in the atmosphere. The oceans act as an enormous carbon sink, and have taken up about a third of CO₂ emitted by human activity. Gas solubility decreases as the temperature of water increases (except when both pressure exceeds 300 bar and temperature exceeds 393 K, only found near deep geothermal vents) and therefore the rate of uptake from the atmosphere decreases as ocean temperatures rise.

Most of the CO₂ taken up by the ocean, which is about 30% of the total released into the atmosphere, forms carbonic acid in equilibrium with bicarbonate and carbonate ions. Some is consumed in photosynthesis by organisms in the water, and a small proportion of that sinks and leaves the carbon cycle. Increased CO₂ in the atmosphere has led to decreasing alkalinity of seawater and there is concern that this may adversely affect organisms living in the water. In particular, with decreasing alkalinity, the availability of carbonates for forming shells decreases, although there's evidence of increased shell production by certain species under increased CO₂ content.

NOAA states in their May 2008 "State of the science fact sheet for ocean acidification" that: "The oceans have absorbed about 50% of the carbon dioxide (CO₂) released from the burning of fossil fuels, resulting in chemical reactions that lower ocean pH. This has caused an increase in hydrogen ion (acidity) of about 30% since the start of the industrial age through a process known as “ocean acidification.” A growing number of studies have demonstrated adverse impacts on marine organisms, including:

The rate at which reef-building corals produce their skeletons decreases, while production of numerous varieties of jellyfish increases.

The ability of marine algae and free-swimming zooplankton to maintain protective shells is reduced.

The survival of larval marine species, including commercial fish and shellfish, is reduced."

Also, the Intergovernmental Panel on Climate Change (IPCC) writes in their Climate Change 2007: Synthesis Report : "The uptake of anthropogenic carbon since 1750 has led to the ocean becoming more acidic with an average decrease in pH of 0.1 units. Increasing atmospheric CO₂ concentrations lead to further acidification [...] While the effects of observed ocean acidification on the marine biosphere are as yet undocumented, the progressive acidification of oceans is expected to have negative impacts on marine shell-forming organisms (e.g. corals) and their dependent species."

Some marine calcifying organisms (including coral reefs) have been singled out by major research agencies, including NOAA, OSPAR commission, NANOOS and the IPCC, because their most current research shows that ocean acidification should be expected to impact them negatively.

The ''Champagne'' hydrothermal vent, found at the Northwest Eifuku volcano at Marianas Trench Marine National Monument, produces almost pure liquid carbon dioxide, one of only two known sites in the world.

Biological role

Carbon dioxide is an end product in organisms that obtain energy from breaking down sugars, fats and amino acids with oxygen as part of their metabolism, in a process known as cellular respiration. This includes all plants, animals, many fungi and some bacteria. In higher animals, the carbon dioxide travels in the blood from the body's tissues to the lungs where it is exhaled. In plants using photosynthesis, carbon dioxide is absorbed from the atmosphere.

Photosynthesis and carbon fixation

Carbon fixation is the removal of carbon dioxide from the air and its incorporation into solid compounds. Plants, algae, and many species of bacteria (cyanobacteria) fix carbon and create their own food by photosynthesis. Photosynthesis uses carbon dioxide and water to produce sugars and occasionally other organic compounds, releasing oxygen as a waste product. These phototrophs use the products of their photosynthesis as internal food sources and as raw material for the construction of more complex organic molecules, such as polysaccharides, nucleic acids and proteins. These are used for their own growth, and also as the basis for the food chains and webs whereby other organisms, including animals such as ourselves, are fed. Some important phototrophs, the coccolithophores synthesise hard calcium carbonate scales. A globally significant species of coccolithophore is ''Emiliania huxleyi'' whose calcite scales have formed the basis of many sedimentary rocks such as limestone, where what was previously atmospheric carbon can remain fixed for geological timescales.

Plants can grow up to 50 percent faster in concentrations of 1,000 ppm CO₂ when compared with ambient conditions, though this assumes no change in climate and no limitation on other nutrients. Some people (for example David Bellamy) believe that as the concentration of CO₂ rises in the atmosphere that it will lead to faster plant growth and therefore increase food production. Recent research supports this position: elevated CO₂ levels cause increased growth reflected in the harvestable yield of crops, with wheat, rice and soybean all showing increases in yield of 12–14% under elevated CO2 in FACE experiments.

Studies have shown that increased CO₂ leads to fewer stomata developing on plants which leads to reduced water usage. Studies using FACE have shown that increases in CO₂ lead to decreased concentration of micronutrients in crop plants. This may have knock-on effects on other parts of ecosystems as herbivores will need to eat more food to gain the same amount of protein.

Plants also emit CO₂ during respiration, and so the majority of plants and algae, which use C3 photosynthesis, are only net absorbers during the day. Though a growing forest will absorb many tons of CO₂ each year, the World Bank writes that a mature forest will produce as much CO₂ from respiration and decomposition of dead specimens (e.g., fallen branches) as is used in biosynthesis in growing plants. However six experts in biochemistry, biogeology, forestry and related areas writing in the science journal Nature that "Our results demonstrate that old-growth forests can continue to accumulate carbon, contrary to the long-standing view that they are carbon neutral." Mature forests are valuable carbon sinks, helping maintain balance in the Earth's atmosphere. Additionally, and crucially to life on earth, photosynthesis by phytoplankton consumes dissolved CO₂ in the upper ocean and thereby promotes the absorption of CO₂ from the atmosphere.

Toxicity

Carbon dioxide content in fresh air (averaged between sea-level and 10 kPa level, i.e., about 30 km altitude) varies between 0.036% (360 ppm) and 0.039% (390 ppm), depending on the location.

Prolonged exposure to moderate concentrations can cause acidosis and adverse effects on calcium phosphorus metabolism resulting in increased calcium deposits in soft tissue. Carbon dioxide is toxic to the heart and causes diminished contractile force.

Toxicity and its effects increase with the concentration of CO₂, here given in volume percent of CO₂ in the air: 1% can cause drowsiness with prolonged exposure. At 2% it is mildly narcotic and causes increased blood pressure and pulse rate, and causes reduced hearing. At about 5% it causes stimulation of the respiratory center, dizziness, confusion and difficulty in breathing accompanied by headache and shortness of breath. Panic attacks may also occur at this concentration. At about 8% it causes headache, sweating, dim vision, tremor and loss of consciousness after exposure for between five and ten minutes.

Due to the health risks associated with carbon dioxide exposure, the U.S. Occupational Safety and Health Administration says that average exposure for healthy adults during an eight-hour work day should not exceed 5,000 ppm (0.5%). The maximum safe level for infants, children, the elderly and individuals with cardio-pulmonary health issues is significantly less. For short-term (under ten minutes) exposure, the U.S. National Institute for Occupational Safety and Health (NIOSH) and American Conference of Government Industrial Hygienists (ACGIH) limit is 30,000 ppm (3%). NIOSH also states that carbon dioxide concentrations exceeding 4% are immediately dangerous to life and health although physiological experiments show that such levels can be tolerated for some time.

Adaptation to increased levels of CO₂ occurs in humans. Continuous inhalation of CO₂ can be tolerated at three percent inspired concentrations for at least one month and four percent inspired concentrations for over a week. It was suggested that 2.0 percent inspired concentrations could be used for closed air spaces (e.g. a submarine) since the adaptation is physiological and reversible. Decrement in performance or in normal physical activity does not happen at this level. However, it should be noted that submarines have carbon dioxide scrubbers which reduce a significant amount of the CO₂ present.

These figures are valid for pure carbon dioxide. In indoor spaces occupied by people the carbon dioxide concentration will reach higher levels than in pure outdoor air. Concentrations higher than 1,000 ppm will cause discomfort in more than 20% of occupants, and the discomfort will increase with increasing CO₂ concentration. The discomfort will be caused by various gases coming from human respiration and perspiration, and not by CO₂ itself. At 2,000 ppm the majority of occupants will feel a significant degree of discomfort, and many will develop nausea and headaches. The CO₂ concentration between 300 and 2,500 ppm is used as an indicator of indoor air quality.

Acute carbon dioxide toxicity is sometimes known by the names given to it by miners: blackdamp (also called ''choke damp'' or ''stythe''). Blackdamp is primarily nitrogen and carbon dioxide and kills via suffocation (having displaced oxygen). Miners would try to alert themselves to dangerous levels of blackdamp and other gasses in a mine shaft by bringing a caged canary with them as they worked. The canary is more sensitive to environmental gasses than humans and as it became unconscious would stop singing and fall off its perch. The Davy lamp could also detect high levels of blackdamp (which collect near the floor) by burning less brightly, while methane, another suffocating gas and explosion risk would make the lamp burn more brightly).

Carbon dioxide differential above outdoor levels at steady state conditions (when the occupancy and ventilation system operation are sufficiently long that CO₂ concentration has stabilized) are sometimes used to estimate ventilation rates per person. CO₂ is considered to be a surrogate for human bio-effluents and may correlate with other indoor pollutants. Higher CO₂ concentrations are associated with occupant health, comfort and performance degradation. ASHRAE Standard 62.1–2007 ventilation rates may result in indoor levels up to 2,100 ppm above ambient outdoor conditions. Thus if the outdoor ambient is 400 ppm, indoor levels may reach 2,500 ppm with ventilation rates that meet this industry consensus standard. Levels in poorly ventilated spaces can be found even higher than this (range of 3,000 or 4,000). [Mendell and Shendell references]

Human physiology

CO₂ is carried in blood in three different ways. (The exact percentages vary depending whether it is arterial or venous blood).

Most of it (about 70% to 80%) is converted to bicarbonate ions by the enzyme carbonic anhydrase in the red blood cells, by the reaction CO₂ + H₂O → H₂CO₃ → H⁺ + . 5% – 10% is dissolved in the plasma

See also

Bosch reaction

Bottled gas

Carbogen

Carbon cycle

Carbon dioxide (data page)

Carbon dioxide sensor

Carbon dioxide sink

Carbon monoxide

CO₂ sequestration

CO₂ degassing in Lake Nyos

Dry ice

EcoCute – As refrigerants

Emission standards

Global warming

Greenhouse gas

Industrial gas

Kaya identity

Ocean acidification

Sabatier process

List of least carbon efficient power stations

References

Further reading

Tyler Volk (2008), ''CO₂ Rising: The World's Greatest Environmental Challenge'', The MIT Press, 223 pages, ISBN 978-0262220835. A short, balanced primer on CO₂'s role as a greenhouse gas. Review at ''Environmental Health Perspectives''

Shendell, Prill, Fisk, Apte1, Blake & Faulkner, Associations between classroom CO₂ concentrations and student attendance in Washington and Idaho, Indoor Air 2004.

Seppanen, Fisk and Mendell, Association of Ventilation Rates and CO₂ Concentrations with Health and Other Responses in Commercial and Institutional Buildings, Indoor Air 1999.

External links

CO₂ Carbon Dioxide Properties, Uses, Applications

Dry Ice information

Trends in Atmospheric Carbon Dioxide ''(NOAA)''

NASA's Orbiting Carbon Observatory

The on-line catalogue of CO₂ natural emissions in Italy

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name	Glenn Beck
birth name	Glenn Edward Lee Beck
birth date	February 10, 1964
birth place	Everett, Washington, U.S.
education	Sehome High School
nationality	American
occupation	Political commentator, author, media proprietor, entertainer
spouse	Claire (1983–1994)Tania (m. 1999); 4 children total
website	Glenn Beck's Official Website
religion	The Church of Jesus Christ of Latter-day Saints (Mormon)
Residence	Manhattan, New York City
Home town	Mount Vernon, Washington, U.S. }}

Glenn Edward Lee Beck (born February 10, 1964) is an American conservative radio host, vlogger, author, entrepreneur, political commentator and former television host. He hosts the ''Glenn Beck Program'', a nationally syndicated talk-radio show that airs throughout the United States on Premiere Radio Networks. He formerly hosted the ''Glenn Beck'' television program, which ran from January 2006 to October 2008 on HLN and from January 2009 to June 2011 on the Fox News Channel. Beck has authored six ''New York Times''-bestselling books. Beck is the founder and CEO of Mercury Radio Arts, a multimedia production company through which he produces content for radio, television, publishing, the stage, and the Internet. It was announced on April 6, 2011, that Beck would "transition off of his daily program" on Fox News later in the year but would team with Fox to "produce a slate of projects for FOX News Channel and FOX News' digital properties". Beck's last daily show on the network was June 30, 2011.

Beck's supporters praise him as a constitutional stalwart defending their traditional American values, while his critics contend he promotes conspiracy theories and employs incendiary rhetoric for ratings.

Personal life

Early years

Glenn Edward Lee Beck was born in Everett, Washington, to William and Mary Beck, who lived in Mountlake Terrace, Washington at the time of their son's birth. The family later moved to Mount Vernon, Washington, where they owned and operated City Bakery in the downtown area. He is descended from German immigrants who came to the United States in the 1800s. Beck was raised as a Roman Catholic and attended Immaculate Conception Catholic School in Mount Vernon.

Glenn and his older sister moved with their mother to Sumner, Washington, attending a Jesuit school in Puyallup. On May 15, 1979, while out on a small boat with a male companion, Beck's mother drowned just west of Tacoma, Washington in Puget Sound. The man who had taken her out in the boat also drowned. A Tacoma police report stated that Mary Beck "appeared to be a classic drowning victim", but a Coast Guard investigator speculated that she could have intentionally jumped overboard. Beck has described his mother's death as a suicide in interviews during television and radio broadcasts.

After their mother's death, Beck and his older sister moved to their father's home in Bellingham, Washington, where Beck graduated from Sehome High School in June 1982. In the aftermath of his mother's death and subsequent suicide of his stepbrother, Beck has said he used "Dr. Jack Daniel's" to cope. At 18, following his high school graduation, Beck relocated to Provo, Utah, and worked at radio station KAYK. Feeling he "didn't fit in", Beck left Utah after six months, taking a job at Washington D.C.'s WPGC in February 1983.

Adulthood

While working at WPGC, Beck met his first wife, Claire. In 1983, the couple married and had two daughters, Mary and Hannah. Mary developed cerebral palsy as a result of a series of strokes at birth in 1988. The couple divorced in 1994 amid Beck's struggles with substance abuse. A recovering alcoholic and drug addict, Beck has been diagnosed with Attention Deficit Hyperactivity Disorder.

By 1994, Beck was suicidal, and imagined shooting himself to the music of Kurt Cobain. He credits Alcoholics Anonymous (AA) with helping him achieve sobriety. He said he stopped drinking alcohol and smoking cannabis in November 1994, the same month he attended his first AA meeting. Beck later said that he had gotten high every day for the previous 15 years, since the age of 16.

In 1996, while working for a New Haven area radio station, Beck took a theology class at Yale University, with a written recommendation from Senator Joe Lieberman, a Yale alumnus who was a fan of Beck's show at the time. Beck enrolled in an "Early Christology" course, but soon withdrew, marking the extent of his post-secondary education.

Beck's then began a "spiritual quest" in which he "sought out answers in churches and bookstores". As he later recounted in his books and stage performances, Beck's first attempt at self-education involved six wide-ranging authors, comprising what Beck jokingly calls "the library of a serial killer": Alan Dershowitz, Pope John Paul II, Adolf Hitler, Billy Graham, Carl Sagan, and Friedrich Nietzsche. During this time, Beck's Mormon friend and former radio partner Pat Gray argued in favor of the "comprehensive worldview" offered by the Church of Jesus Christ of Latter-day Saints, an offer that Beck rejected until a few years later.

In 1999, Beck married his second wife, Tania. After they went looking for a faith on a church tour together, they joined The Church of Jesus Christ of Latter-day Saints in October 1999, partly at the urging of his daughter Mary. Beck was baptized by his old friend, and current-day co-worker Pat Gray. Beck and his current wife have had two children together, Raphe (who is adopted) and Cheyenne. Until April 2011, the couple live in New Canaan, Connecticut, with the four children.

Beck announced in July 2010 that he had been diagnosed with macular dystrophy, saying "A couple of weeks ago I went to the doctor because of my eyes, I can't focus my eyes. He did all kinds of tests and he said, 'you have macular dystrophy ... you could go blind in the next year. Or, you might not. The disorder can make it difficult to read, drive or recognize faces.

In July 2011, Beck leased a house in the Dallas–Fort Worth suburb of Westlake, Texas.

Career

In 2002 Beck created the media platform Mercury Radio Arts as the umbrella over various broadcast, publishing, Internet, and live show entities.

Radio

In 1983 he moved to Corpus Christi, Texas, to work at radio station KZFM. In mid-1985, Beck was hired away from KZFM to be the lead DJ for the morning-drive radio broadcast by WRKA in Louisville, Kentucky. His four-hour weekday show was called ''Captain Beck and the A-Team''. Beck had a reputation as a "young up-and-comer". The show was not political and included the usual off-color antics of the genre: juvenile jokes, pranks, and impersonations. The show slipped to third in the market and Beck left abruptly in 1987 amid a dispute with WRKA management.

Months later, Beck was hired by Phoenix Top-40 station KOY-FM, then known as Y-95. Beck was partnered with Arizona native Tim Hattrick to co-host a local "morning zoo" program. During his time at Y-95, Beck cultivated a rivalry with local pop radio station KZZP and that station's morning host Bruce Kelly. Through practical jokes and publicity stunts, Beck drew criticism from the staff at Y-95 when the rivalry culminated in Beck telephoning Kelly's wife on-the-air, mocking her recent miscarriage. In 1989, Beck resigned from Y-95 to accept a job in Houston at KRBE, known as Power 104. Beck was subsequently fired in 1990 due to poor ratings.

Beck then moved on to Baltimore, Maryland and the city's leading Top-40 station, WBSB, known as B104. There, he partnered with Pat Gray, a morning DJ. During his tenure at B104, Beck was arrested and jailed for speeding in his DeLorean. According to a former associate, Beck was "completely out of it" when a station manager went to bail him out. When Gray, then Beck were fired, the two men spent six months in Baltimore, planning their next move. In early 1992, Beck and Gray both moved to WKCI-FM (KC101), a Top-40 radio station in Hamden, Connecticut. In 1995, WKCI apologized after Beck and Gray mocked a Chinese-American caller on air who felt offended by a comedy segment by playing a gong sound effect and having executive producer Alf Gagineau mock a Chinese accent. That incident led to protests by activist groups. When Gray left the show to move to Salt Lake City, Beck continued with co-host Vinnie Penn. At the end of 1998, Beck was informed that his contract would not be renewed at the end of 1999.

The ''Glenn Beck Program'' first aired in 2000 on WFLA (AM) in Tampa, Florida, and took their afternoon time slot from eighteenth to first place within a year. In January 2002, Premiere Radio Networks launched the show nationwide on 47 stations. The show then moved to Philadelphia, Pennsylvania, broadcasting from new flagship station WPHT. On November 5, 2007, ''The New York Times'' reported that Premiere Radio Networks was extending Beck's contract. By May 2008, it had reached over 280 terrestrial stations as well as XM Satellite. It was ranked 4th in the nation with over six and a half million listeners. Glenn Beck is number three in the ratings behind Rush Limbaugh and Sean Hannity.

Television

In January 2006, CNN's ''Headline News'' announced that Beck would host a nightly news-commentary show in their new prime-time block ''Headline Prime''. The show, simply called ''Glenn Beck'', aired weeknights. ''CNN Headline News'' described the show as "an unconventional look at the news of the day featuring his often amusing perspective". At the end of his tenure at CNN-HLN, Beck had the second largest audience behind Nancy Grace. In 2008, Beck won the Marconi Radio Award for Network Syndicated Personality of the Year.

In October 2008, it was announced that Beck would join the Fox News Channel, leaving CNN Headline News. After moving to the Fox News Channel, Beck hosted ''Glenn Beck'', beginning in January 2009, as well as a weekend version. One of his first guests was Alaska Governor Sarah Palin He also has a regular segment every Friday on the Fox News Channel program ''The O'Reilly Factor'' titled "At Your Beck and Call". Beck's program drew more viewers than all three of the competing time-slot shows combined on CNN, MSNBC and HLN.

His show's high ratings have not come without controversy. ''The Washington Post''s Howard Kurtz reported that Beck's use of "distorted or inflammatory rhetoric" has complicated the channel's and their journalist's efforts to neutralize White House criticism that Fox is not really a news organization. Television analyst Andrew Tyndall echoed these sentiments, saying that Beck's incendiary style had created "a real crossroads for Fox News", stating "they're right on the cusp of losing their image as a news organization."

In April 2011, Fox News and Mercury Radio Arts, Beck's production company, announced that Beck would "transition off of his daily program" on Fox News in 2011. His last day at Fox was later announced as June 30. FNC and Beck announced that he would be teaming with Fox to produce a slate of projects for Fox News and its digital properties. Fox News head Roger Ailes later referenced Beck's entrepreneurialism and political movement activism, saying, "His [Beck's] goals were different from our goals ... I need people focused on a daily television show." Beck hosted his last daily show on Fox on June 30, 2011, where he recounted the accomplishments of the show and said, "This show has become a movement. It's not a TV show, and that's why it doesn’t belong on television anymore. It belongs in your homes. It belongs in your neighborhoods." In response to critics who said he was fired, Beck pointed out that his final show was airing live. Immediately after the show he did an interview on his new GBTV internet channel.

GBTV

On June 7, 2011, Beck's company, Mercury Radio Arts, announced the new subscription-based internet TV network, GBTV. Glenn Beck's Fox News one-hour show ended June 30, 2011, and his new two-hour show will begin on GBTV.com starting September 12, 2011.

Books

Beck has reached #1 on the ''New York Times'' Bestseller List in four separate categories : Hardcover Non-Fiction, Paperback Non-Fiction, Hardcover Fiction, and Children's Picture Books.

''The Real America: Messages from the Heart and Heartland'', Simon & Schuster 2003. ISBN 978-0-7434-9696-4

''An Inconvenient Book: Real Solutions to the World's Biggest Problems'', Simon & Schuster 2007. ISBN 978-1-4391-6857-8

''The Christmas Sweater'', Simon & Schuster 2008. ISBN 978-1-4165-9485-7

''America's March to Socialism: Why We're One Step Closer to Giant Missile Parades'', 2008 (Audiobook) ''An Unlikely Mormon: The Conversion Story of Glenn Beck'', Deseret Book 2008 (Audiobook). ISBN 978-1-59038-944-7

''The Christmas Sweater: A Picture Book'', Simon & Schuster Children's Publishing 2009. ISBN 978-1-4169-9543-2

''America's March to Socialism: Why We're One Step Closer to Giant Missile Parades'', Simon & Schuster Audio 2009 (Audio CD). ISBN 978-0-7435-9854-5

''Glenn Beck's Common Sense: The Case Against an Out-of-Control Government'', Simon & Schuster 2009. ISBN 978-1-4391-6857-8

''Arguing with Idiots: How to Stop Small Minds and Big Government'', Simon & Schuster 2009. ISBN 978-1-4165-9501-4

''Idiots Unplugged'', Simon & Schuster 2010 (Audio CD). ISBN 1-4423-3396-0

''The Overton Window'', Threshold Editions 2010. ISBN 1-4391-8430-5 ''Idiots Unplugged'', 2010 (Audiobook) ''Broke: The Plan to Restore Our Trust, Truth, and Treasure'', Simon & Schuster 2010. ISBN 1-4423-3457-6.

''The 7: Seven Wonders That Will Change Your Life'', Keith Ablow, co-author; Threshold Editions, 2011; ISBN 978-1451625516.

''The Original Argument: The Federalists' Case for the Constitution, Adapted for the 21st Century'', with Joshua Charles; Threshold Editions, 2011; ISBN 978-1451650617.

Beck also authorized a comic book: ''Political Power: Glenn Beck'', by Jerome Maida, Mark Sparacio (illus.); Bluewater Productions, 2011; ISN B004VGB4FO

Stage shows and speeches

Since 2005, Beck has toured American cities twice a year, presenting a one-man stage show. His stage productions are a mix of stand-up comedy and inspirational speaking. In a critique of his live act, ''Salon Magazine's'' Steve Almond describes Beck as a "wildly imaginative performer, a man who weds the operatic impulses of the demagogue to the grim mutterings of the conspiracy theorist". A show from the ''Beck `08 Unelectable Tour'' was shown in around 350 movie theaters around the country. The finale of 2009's ''Common Sense Comedy Tour'' was simulcast in over 440 theaters. The events have drawn 200,000 fans in recent years.

In March 2003, Beck ran a series of rallies, which he called Glenn Beck's Rally for America, in support of troops deployed for the upcoming Iraq War. On July 4, 2007, Beck served as host of the 2007 Toyota Tundra "Stadium of Fire" in Provo, Utah. The annual event at LaVell Edwards Stadium on the Brigham Young University campus is presented by America's Freedom Foundation. In May 2008, Beck gave the keynote speech at the NRA convention in Louisville, Kentucky.

In late August 2009, the mayor of Beck's hometown, Mount Vernon, Washington, announced that he would award Beck the Key to the City, designating September 26, 2009 as "Glenn Beck Day". Due to local opposition, the city council voted unanimously to disassociate itself from the award. The key presentation ceremony sold-out the 850 seat McIntyre Hall and an estimated 800 detractors and supporters demonstrated outside the building. Earlier that day, approximately 7,000 people attended the Evergreen Freedom Foundation's "Take the Field with Glenn Beck" at Seattle's Safeco Field.

In December 2009, Beck produced a one-night special film titled "The Christmas Sweater: A Return to Redemption". In January and February 2010, Beck teamed with fellow Fox News host Bill O'Reilly to tour several cities in a live stage show called "The Bold and Fresh Tour 2010". The January 29 show was recorded and broadcast to movie theaters throughout the country.

Projects and rallies

9-12 Project and Tea Party protests

In March 2009 Beck put together a campaign, the 9-12 Project, that is named for nine principles and twelve values which he says embody the spirit of the American people on the day after the September 11 attacks. The Colorado 9-12 Project hosted a "Patriot Camp" for kids in grades 1–5, featuring programs on "our Constitution, the Founding Fathers, and the values and principles that are the cornerstones of our nation".

Restoring Honor rally

The Restoring Honor rally was promoted by Beck and held at the Lincoln Memorial in Washington, D.C. on August 28, 2010. The rally — which purported to embrace religious faith and patriotism — was co-sponsored by the Special Operations Warrior Foundation, promoted by FreedomWorks, and supported by the Tea Party movement.

''America's First Christmas''

In December 2010, Beck went to Wilmington, Ohio, a town devastated by the late-2000s recession, to host live events to encourage his fans to go to the town to boost the local economy in a project called "America's First Christmas". He hosted an event and his radio and television shows from the local theater.

2011 international tour

Beck headlined his "Restoring Courage" events in Jerusalem, Israel, in August 2011 in a campaign Beck said was designed to encourage people worldwide "to stand with the Jewish people". After Jerusalem, Beck visited Cape Town, South Africa, and was scheduled to visit Venezuela.

Political views

Beck has described himself as a conservative with libertarian leanings. Among his core values Beck lists personal responsibility, private charity, the right to life, freedom of religion, limited government, and family as the cornerstone of society. Beck believes in low national debt, and has said "A conservative believes that debt creates unhealthy relationships. Everyone, from the government on down, should live within their means and strive for financial independence." He supports individual gun ownership rights and is against gun control legislation.

Beck believes that there is a lack of evidence that human activity is the main cause of global warming. He holds that there is a legitimate case that global warming has, at least in part, been caused by mankind, and has tried to do his part by buying a home with a "green" design. He also views the American Clean Energy and Security Act as a form of wealth redistribution, and has promoted a petition rejecting the Kyoto Protocol.

Opposition to progressivism

During his 2010 keynote speech to Conservative Political Action Conference (CPAC), Beck wrote the word "progressivism" on a chalkboard and declared, "This is the disease. This is the disease in America", adding "progressivism is the cancer in America and it is eating our Constitution!" According to Beck, the progressive ideas of men such as John Dewey, Herbert Croly, and Walter Lippmann, influenced the Presidencies of Theodore Roosevelt and Woodrow Wilson; eventually becoming the foundation for President Franklin D. Roosevelt’s New Deal. Beck has said that such progressivism infects both main political parties and threatens to "destroy America as it was originally conceived". In Beck’s book ''Common Sense'', he argues that "progressivism has less to do with the parties and more to do with individuals who seek to redefine, reshape, and rebuild America into a country where individual liberties and personal property mean nothing if they conflict with the plans and goals of the State."

A collection of progressives, whom Beck has referred to as "Crime Inc.", comprise what Beck contends is a clandestine conspiracy to take over and transform America. Some of these individuals include Cass Sunstein, Van Jones, Andy Stern, John Podesta, Wade Rathke, Joel Rogers and Francis Fox Piven. Other figures tied to Beck's "Crime Inc." accusation include Al Gore, Franklin Raines, Maurice Strong, George Soros, John Holdren and President Barack Obama. According to Wilentz, Beck's "version of history" places him in a long line of figures who have challenged mainstream political historians and presented an inaccurate opposing view as the truth, stating:

Conservative David Frum, the former speechwriter for President George W. Bush, has also alleged Beck's propensity for negationism, remarking that "Beck offers a story about the American past for people who are feeling right now very angry and alienated. It is different enough from the usual story in that he makes them feel like they’ve got access to secret knowledge."

Ideological influences

Political and historical

An author with ideological influence on Beck is W. Cleon Skousen (1913–2006), a prolific conservative political writer, American Constitutionalist and faith-based political theorist. As an anti-communist supporter of the John Birch Society, and limited-government activist, Skousen, who was Mormon, wrote on a wide range of subjects: the Six-Day War, Mormon eschatology, New World Order conspiracies, even parenting. Skousen believed that American political, social, and economic elites were working with Communists to foist a world government on the United States. Beck praised Skousen's "words of wisdom" as "divinely inspired", referencing Skousen's ''The Naked Communist'' and especially ''The 5,000 Year Leap'' (originally published in 1981), which Beck said in 2007 had "changed his life". According to Skousen's nephew, Mark Skousen, ''Leap'' reflects Skousen's "passion for the United States Constitution", which he "felt was inspired by God and the reason behind America's success as a nation". The book is touted by Beck as "required reading" to understand the current American political landscape and become a "September twelfth person". Beck authored a foreword for the 2008 edition of ''Leap'' and Beck's on-air recommendations in 2009 propelled the book to number one in the government category on Amazon for several months. In 2010, Matthew Continetti of the conservative ''Weekly Standard'' criticized Beck's conspiratorial bent, terming him "a Skousenite". Additionally, Alexander Zaitchik, author of the 2010 book ''Common Nonsense: Glenn Beck and the Triumph of Ignorance'', which features an entire chapter on "The Ghost of Cleon Skousen", refers to Skousen as "Beck's favorite author and biggest influence", while noting that he authored four of the 10 books on Beck's 9-12 Project required-reading list.

In his discussion of Beck and Skousen, Continetti said that one of Skousen's works "draws on Carroll Quigley’s ''Tragedy and Hope'' (1966), which argues that the history of the 20th century is the product of secret societies in conflict", noting that in Beck's novel ''The Overton Window'', which Beck describes as "faction" (fiction based on fact), one of his characters states "Carroll Quigley laid open the plan in ''Tragedy and Hope'', the only hope to avoid the tragedy of war was to bind together the economies of the world to foster global stability and peace."

Princeton University historian Sean Wilentz says that alongside Skousen, Robert W. Welch, Jr., founder of the John Birch Society, is a key ideological foundation of Beck's worldview. According to Wilentz: "[Beck] has brought neo-Birchite ideas to an audience beyond any that Welch or Skousen might have dreamed of."

Other books that Beck regularly cites on his programs are Amity Shlaes's ''The Forgotten Man'', Jonah Goldberg's ''Liberal Fascism'', Larry Schweikart and Michael Allen's ''A Patriot's History of the United States'', and Burton W. Folsom, Jr.'s ''New Deal or Raw Deal''. Beck has also urged his listeners to read ''The Coming Insurrection'', a book by a French Marxist group discussing what they see as the imminent collapse of capitalist culture, and ''The Creature from Jekyll Island'', which argues that aspects of the U.S. Federal Reserve system assault economic civil liberties, by G. Edward Griffin.

On June 4, 2010, Beck endorsed Elizabeth Dilling's 1936 work ''The Red Network: A Who's Who and Handbook of Radicalism for Patriots'', remarking "this is a book, ''The Red Network'', this came in from 1936. People — [Joseph] McCarthy was absolutely right ... This is, who were the communists in America." Beck was criticized by an array of people, including Menachem Z. Rosensaft and Joe Conason, who stated that Dilling was an outspoken anti-Semite and a Nazi sympathizer.

Religious

Beck has credited God for saving him from drug and alcohol abuse, professional obscurity and friendlessness. In 2006, Beck performed a short inspirational monologue in Salt Lake City, Utah, detailing how he was transformed by the "healing power of Jesus Christ", which was released as a CD two years later by Deseret Book, a publishing company owned by the LDS Church, entitled ''An Unlikely Mormon: The Conversion Story of Glenn Beck''.

Religious scholar Joanna Brooks contends that Beck developed his "amalgation of anti-communism" and "connect-the-dots conspiracy theorizing" only after his entry into the "deeply insular world of Mormon thought and culture". Brooks theorizes that Beck's calls to fasting and prayer are rooted in Mormon collective fasts to address spiritual challenges, while Beck's "overt sentimentality" and penchant for weeping represent the hallmark of a "distinctly Mormon mode of masculinity" where "appropriately-timed displays of tender emotion are displays of power" and spirituality. Philip Barlow, the Arrington chair of Mormon history and culture at Utah State University, has said that Beck's belief that the U.S. Constitution was an "inspired document", his calls for limited government and for not exiling God from the public sphere, "have considerable sympathy in Mormonism". Beck has acknowledged that the Mormon "doctrine is different" from traditional Christianity, but said that this was what attracted him to it, stating that "for me some of the things in traditional doctrine just doesn't work."

Particularly as a consequence of Beck's Restoring Honor rally in 2010, the fact that Beck is Mormon caused concern amongst some politically sympathetic Christian Evangelicals on theological grounds. Tom Tradup, vice president at Salem Radio Network, which serves more than 2,000 Christian-themed stations, expressed this sentiment after the rally, stating "Politically, everyone is with it, but theologically, when he says the country should turn back to God, the question is: Which God?" Subsequently, a September 2010 survey conducted by the Public Religion Research Institute (PRRI) and Religion News Service (RNS) found that of those Americans who hold a favorable opinion of Beck, only 45% believe he is the right person to lead a religious movement, with that number further declining to 37% when people are informed he is Mormon. Daniel Cox, Director of Research for PRRI, summed up this position by stating:

Pete Peterson of Pepperdine's Davenport Institute said that Beck's speech at the rally belonged to an American tradition of calls to personal renewal. Peterson wrote: "A Mormon surrounded onstage by priests, pastors, rabbis, and imams, Beck [gave] one of the more ecumenical jeremiads in history." Evangelical pastor Tony Campolo said in 2010 that conservative evangelicals respond to Beck's framing of conservative economic principles, saying that Beck's and ideological fellow travelers' "marriage between evangelicalism and patriotic nationalism is so strong that anybody who is raising questions about loyalty to the old, lassez-faire capitalist system is ex post facto unpatriotic, un-American, and by association non-Christian.” ''Newsweek'' religion reporter Lisa Miller, after quoting Campolo, opined, "It's ironic that Beck, a Mormon, would gain acceptance as a leader of a new Christian coalition. ... Beck's gift ... is to articulate God's special plan for America in such broad strokes that they trample no single creed or doctrine while they move millions with their message."

After attempting unsuccessfully for a year to arrange a meeting with Protestant evangelist Billy Graham, Beck was invited to meet with Graham on February 19, 2011. Days later, Beck described the circumstances, writing: "Two weeks ago, as I have been struggling with some ideas and some things that I am working on for the future and I am trying to get clarity again, I thought of Billy Graham. When the phone rang and they said the Reverend feels it’s time to meet, I met with him. We had an hour scheduled. It lasted three hours." Earlier, in a January 2011 interview with ''Christianity Today'', Graham had said he regretted instances where he had strayed into politics in the past.

Public reception

In 2009, the Glenn Beck show was one of the highest rated news commentary programs on cable TV. For a Barbara Walters ABC special, Beck was selected as one of America’s "Top 10 Most Fascinating People" of 2009. In 2010, Beck was selected for the Times top 100 most influential people under the "Leaders" category.

Beck has referred to himself as an entertainer, and a "rodeo clown".

thumb|Beck at the [[Time 100|''Time'' 100 Gala, 2010]]''Time Magazine'' described Beck as "[t]he new populist superstar of Fox News" saying it is easier to see a set of attitudes rather than a specific ideology, noting his criticism of Wall Street, yet defending bonuses to AIG, as well as denouncing conspiracy theories about the Federal Emergency Management Agency (FEMA) but warning against indoctrination of children by the AmeriCorps program. (Paul Krugman and Mark Potok, on the other hand, have been among those asserting that Beck helps spread "hate" by covering issues that stir up extremists.) What seems to unite Beck's disparate themes, ''Time'' argued, is a sense of siege. One of Beck's Fox News Channel colleagues Shepard Smith, has jokingly called Beck's studio the "fear chamber", with Beck countering that he preferred the term "doom room".

Republican South Carolina U.S. Senator Lindsey Graham criticized Beck as a "cynic" whose show was antithetical to "American values" at ''The Atlantic'''s 2009 First Draft of History conference, remarking "Only in America can you make that much money crying." The progressive watchdog group Fairness and Accuracy in Reporting's (FAIR) Activism Director Peter Hart argues that Beck red-baits political adversaries as well as promotes a paranoid view of progressive politics. Howard Kurtz of ''The Washington Post'' has remarked that "Love him or hate him, Beck is a talented, often funny broadcaster, a recovering alcoholic with an unabashedly emotional style."

Glenn Beck was honored by Liberty University during their 2010 Commencement exercises with an honorary Doctoral Degree. During his keynote address to the students, he stated "As a man who was never able to go to college — I’m the first in my family that went; I went for one semester; I couldn’t afford more than that — I am humbly honored." In June 2011, Beck announced he was to be the honored with the Zionist Organization of America's 2011 Defender of Israel Award.

Laura Miller writes in Salon.com that Beck is a contemporary example of "the paranoid style in American politics" described by historian Richard Hofstader:

"The Paranoid Style in American Politics" reads like a playbook for the career of Glenn Beck, right down to the paranoid's "quality of pedantry" and "heroic strivings for 'evidence, embodied in Beck's chalkboard and piles of books. But Beck lacks an archenemy commensurate with his stratospheric ambitions, which makes him appear even more absurd to outsiders.

Critical biographies

In June 2010, investigative reporter Alexander Zaitchik released a critical biography titled ''Common Nonsense: Glenn Beck and the Triumph of Ignorance'', with a title mocking Beck's work, ''Common Sense''. In an interview about the book, Zaitchik theorized that "Beck’s politics and his insatiable hunger for money and fame are not mutually exclusive", while stating: "Beck’s true religion is not Patriotism, Mormonism, or Conservatism. His true religion is cross-platform self-marketing ... According to Beck’s worldview, there’s no inherent contradiction between his sophisticated instinct for self-promotion, his propagandist rodeo clown act, his self-image as a media mogul, and his professed belief system. I think he actually believes that God wants him to make a ton of money and become this huge celebrity by fear mongering and generally doing whatever it takes in the media to promote right-wing causes."

In September 2010, ''Philadelphia Daily News'' reporter Will Bunch released ''The Backlash: Right-Wing Radicals, High-Def Hucksters, and Paranoid Politics in the Age of Obama''. One of Bunch's theses is that Beck is nothing more than a morning zoo deejay playing a fictional character as a money-making stunt. Writer Bob Cesca, in a review of Bunch's book, compares Beck to Steve Martin's faith-healer character in the 1992 film ''Leap of Faith'', before describing the "derivative grab bag of other tried and tested personalities" that Bunch contends comprises Beck's persona: In October 2010 a polemical biography by Dana Milbank was released: ''Tears of a Clown: Glenn Beck and the Tea Bagging of America''.

Satire, spoof and parody

Beck has been the subject of mockery and ridicule by a number of humorists. In response to Beck's animated delivery and views, he was parodied in an impersonation by Jason Sudeikis on ''Saturday Night Live''. ''The Daily Show''s Jon Stewart has spoofed Beck's 9-12 project with his own "11-3 project", consisting of "11 principles and 3 herbs and spices", impersonated Beck's chalk board-related presentation style for an entire show, and quipped about Beck "finally, a guy who says what people who aren't thinking are thinking". Stephen Colbert of ''The Colbert Report'' satirized Beck's "war room" by creating his own "doom bunker". Through the character Eric Cartman, ''South Park'' parodied Beck's television program and his commentary style in the episode "Dances with Smurfs". ''The Onion'', a satirical periodical and faux news site, ran an ''Onion News Network'' video "special report" where it lamented that the "victim in a fatal car accident was tragically not Glenn Beck". Meanwhile, the ''Current TV'' cartoon ''SuperNews!'' ran an animated cartoon feature titled "The Glenn Beck Apocalypse", where Beck is confronted by Jesus Christ who rebukes him as the equivalent of "Sarah Palin farting into a balloon". Political comedian and satirist Bill Maher has mocked Beck's followers as an "army of diabetic mallwalkers", while ''The Buffalo Beast'', named Beck the most loathsome person in America in 2010, declaring "It's like someone found a manic, doom-prophesying hobo in a sandwich board, shaved him, shot him full of Zoloft and gave him a show." The October 31 Rally To Restore Sanity and/or Fear in Washington, hosted by Comedy Central personalities Jon Stewart and Stephen Colbert, was conceived as a parody of Beck's earlier Rally to Restore Honor, even though Stewart and Colbert said that they came up with the idea of holding a rally in March and Stewart had put down the deposit for the National Mall before Beck announced his rally.

Public disputes

Obama

Several incidents involving Beck and President Barack Obama have resulted in notable public controversy. In response to Obama's remarks on the Henry Louis Gates controversy, Beck argued that Obama has repeatedly shown "a deep-seated hatred for white people or the white culture", saying "I'm not saying he doesn't like white people. I'm saying he has a problem. This guy is, I believe, a racist." These remarks drew criticism, and resulted in a boycott promulgated by Color of Change. In 2009, the boycott resulted in at least 57 advertisers requesting their ads be removed from his programming, to avoid associating their brands with content that could be considered offensive by potential customers. He later apologized for the remarks, telling Fox News Sunday anchor Chris Wallace that he has a "big fat mouth" and miscast as racism what is actually, as he theorizes, Obama's belief in black liberation theology.

Van Jones

In July 2009, Beck began to focus what would become many episodes on his TV and radio shows on Van Jones, Special Advisor for Green Jobs at Obama's White House Council on Environmental Quality. Beck was critical of Jones' involvement in STORM, a left wing non-governmental group, and his support for death row inmate Mumia Abu-Jamal, who had been convicted of killing a police officer. Beck spotlighted video of Jones referring to Republicans as "assholes", and a petition Jones signed suggesting that George W. Bush knowingly let the 9/11 attacks happen. In a move attributed by ''The New York Times'' to criticism of his earlier statements by conservatives and Republicans, Jones resigned his position in September 2009. ''Time'' magazine credited Beck with leading conservatives' attack on Jones. Jones characterized the attacks from his opponents as a "vicious smear campaign" and an effort to use "lies and distortions to distract and divide".

ACORN

In 2009, Beck and other conservative commentators were critical of Association of Community Organizations for Reform Now (ACORN) for various reasons, including claims of voter registration fraud in the 2008 presidential election. In September 2009, he broadcast a series of heavily edited undercover videos by conservative activists James O'Keefe and Hannah Giles, which seemed to portray ACORN community organizers offering inappropriate tax advice to people who said they were engaged in illegal activities. Following the videos' release, the U.S. Census Bureau severed ties with the group while the U.S. House and Senate voted to cut all of its federal funding.

Satire website

In 2009, lawyers for Beck brought a case (''Beck v. Eiland-Hall'') against the owner of a satirical website named ''GlennBeckRapedAndMurderedAYoungGirlIn1990.com'' with the World Intellectual Property Organization (WIPO). The claim that the domain name of the website is itself defamatory was described as a first in cyberlaw. Beck's lawyers argued that the site infringed on his trademarked name and that the domain name should be turned over to Beck. The WIPO ruled against Beck, but Eiland-Hall voluntarily transferred the domain to Beck anyway, saying that the First Amendment had been upheld and that he no longer had a use for the domain name.

Jewish Funds for Justice

In January 2011, in protest at what they saw as inappropriate references to the Holocaust and to Nazis by Beck (and by Roger Ailes of Fox News), four hundred rabbis signed an open letter in paid advertisement in the Wall Street Journal. The ad was paid for by Jewish Funds for Justice which had previously called for Beck's firing. The JFFJ have claimed on their website that Beck seems "to draw his material straight from the anti-Semitic forgery, the ''Protocols of the Elders of Zion''". The letter states that Beck and Fox had "...diminish[ed] the memory and meaning of the Holocaust when you use it to discredit any individual or organization you disagree with. That is what Fox News has done in recent weeks." In response, a Fox News executive said to Reuters that the letter was from a "George Soros-backed leftwing political organization".

Reform Judaism

On February 22, 2011, during a discussion on his radio show about the controversy surrounding his earlier comments about Soros, Beck said "Reform Rabbis are generally political in nature. It's almost like radicalized Islam in a way where it's less about religion than it is about politics." He was quickly criticized by other conservatives, Jewish rabbis, and others. The Anti-Defamation League labeled Beck's remarks as "bigoted ignorance". On February 24, Beck apologized on air, agreeing that his comments were "ignorant".

2011 Norway attacks

In the wake of the 2011 Norway attacks, Beck received condemnation for his comparison of murdered and surviving members of the Norwegian Workers' Youth League to the Hitler Youth: "There was a shooting at a political camp which sounds a little like, you know, the Hitler Youth or whatever, you know what I mean. Who does a camp for kids that's all about politics? Disturbing." The statement was ill-received in Norway, leading senior political commentator Frank Aarebrot to label Beck as a "vulgar propagandist" and a "fascist", and Torbjørn Eriksen, former press secretary to Norway's prime minister Jens Stoltenberg, to describe Beck's comment as "a new low", adding that "Glenn Beck's comments are ignorant, incorrect and extremely hurtful". Commentators pointed out that groups affiliated with the Tea Party movement and the Beck-founded 9-12 Project also sponsor politically oriented camp programs for children. Beck condemned the attack in spite of his statements about its victims.

See also

Beck University

Conservative talk

List of most-listened-to radio programs

References

External links

Glenn Beck's Radio Program

Glenn Beck – The 912 Project

Official Site at Fox News

Multimedia

A Day in the Life of Glenn Beck - slideshow by ''Time magazine''

Katie Couric Interview of Glenn Beck - video by ''CBS News''

"Brand it like Beck" - video interview by ''Forbes magazine''

John Stossel: "Glenn Beck, Conservative Narcissist?" - video by ''ABC News''

Glenn Beck Discusses his Mormonism - video testimonial at ''The Week''

In the Words of Glenn Beck - slideshow by ''Life magazine''

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