The lithium-air battery, Li-air for short, is a metal-air battery chemistry that uses the oxidation of lithium at the anode and reduction of oxygen at the cathode to induce a current flow. Originally proposed in the 1970’s as a possible power source for electric vehicles, Li-air batteries recaptured scientific interest in the late 2000’s due to advances in materials technology and an increasing demand for environmentally safe and oil-independent energy sources. Currently, four types of Li-air batteries are being pursued; aprotic,aqueous, solid state, and mixed aqueous/aprotic.

The major appeal of the Li-air battery is the extremely high energy density, a measure of the amount of energy a battery can store for a given volume, which rivals that of traditional gasoline powered engines. Li-air batteries gain this advantage in energy density since they use oxygen from the air instead of storing an oxidizer internally.

The technology is still in its infancy and will require significant research efforts in a variety of fields, however, scientists and industry alike see potential in its development.

The Good, the Bad and the Ugly (Italian: Il buono, il brutto, il cattivo) is a 1966 Italian epic Spaghetti western film directed by Sergio Leone, starring Clint Eastwood, Lee Van Cleef, and Eli Wallach in the title roles. The screenplay was written by Age & Scarpelli, Luciano Vincenzoni and Leone, based on a story by Vincenzoni and Leone. Director of photography Tonino Delli Colli was responsible for the film's sweeping widescreen cinematography and Ennio Morricone composed the famous film score, including its main theme. It is the third film in the Dollars Trilogy following A Fistful of Dollars (1964) and For a Few Dollars More (1965). The plot revolves around three gunslingers competing to find a fortune in buried Confederate gold amid the violent chaos of gunfights, hangings, American Civil War battles and prison camps.

In a desolate ghost town during the American Civil War, bandit Tuco Ramirez ("The Ugly," Eli Wallach) narrowly shoots his way past three bounty hunters to freedom, killing two but only badly wounding the third. Miles away, Angel Eyes ("The Bad," Lee Van Cleef) interrogates a former soldier called Stevens (Antonio Casas) about a missing man named Jackson who has taken on the name "Bill Carson" (Antonio Casale) and a cache of stolen Confederate gold. He brutally guns down Stevens and his eldest son after the interrogation, but not before Stevens pays Angel Eyes to kill Angel Eyes' employer, another former soldier named Baker. Angel Eyes later collects his fee for Stevens' killing from Baker, and then shoots and kills him, too.