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Bike-sharing revolution aims to put China back on two wheelsFrom Shanghai to Sichuan, schemes are being rolled out to slash congestion, cut air pollution – and spin a profit
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Shanghai water supply hit by 100-tonne wave of garbageShips are suspected of dumping waste upstream on China’s Yangtze river before it floats into a key city reservoir
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Smog refugees flee Chinese cities as 'airpocalypse' blights half a billionThousands forced to escape to pollution-free regions as haze descends on the country’s northern industrial heartland
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This $500 shirt changes color when exposed to air pollution – but who does it help?A NYC-based designer says he wants to make people pay more attention to the environment. But at these prices, is this more art than activism?
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Guardian editors discuss the future of global climate change policy – Project podcastThe first in a new series of in-depth discussions featuring expert correspondents from Australia, China and across south-east Asia
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China limits cars and closes factories in smog red alertHundreds of Beijing companies forced to stop production and hospitals prepare for surge in pollution-related illnesses
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Southern Water fined record £2m for sewage leak on Kent beachesThanet council forced to close beaches for nine days due to ‘catastrophic’ leakage and public health concerns
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Five ways public-private partnerships can build healthier citiesTwo-thirds of the global population will live in cities by 2050. An expert panel shares their thoughts on solving our greatest urban public health challenges
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Beijing smog: pollution red alert declared in China capital and 21 other citiesAuthorities issue five-day warning and order schools to close, residents to stay indoors and heavy industry to slow or halt production
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Breathe less … or ban cars: cities have radically different responses to pollutionWhen thick smog recently hit, Londoners were advised to avoid exercise, while Parisians got free public transport. Which is the best solution?
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Getting better all the time? Not any more…Brief letters: VW pollution | Convalescence | Train guards | Unite election | Hellebores | Cocaine capital
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Leaked BP report reveals serious near-miss accidentsCostly failures show ‘urgent attention’ needed to improve how oil giant manages crucial engineering data at plants
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Wind power key to curbing greenhouse emissions, study findsEdinburgh University researchers say windfarm energy prevented 36m tonnes of harmful coal and gas emissions in six years
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Why logs are twice as dirty as dieselPollutionwatch We think of wood burning as natural, but experiments show that wood smoke contains shocking levels of harmful particles
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The filthy practice of exporting highly polluting fuel to Africa is symbolic of big business the world over: where profit is king, human life becomes trivialAfrica is being choked. But corporations leave their grime on us all
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Over 200 years of deadly London air: smogs, fogs, and pea soupers60 years after the Clean Air Act, Londoners still suffer from air pollution. What can we can learn from two centuries of campaigns against city smog?
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Dieselgate: EC begins legal action against UK and other EU nationsGermany and Spain among those accused of failing to set up penalty systems to deter violations of emissions law
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Paris bans cars for second day running as pollution chokes cityVehicles with odd-number plates were banned on Tuesday and, on Wednesday, it was the even numbers’ turn
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London mayor to double funding to tackle air pollutionCampaigners hail announcement that funding for air quality measures will rise to £875m over the next five years
Madrid bans half of cars from roads to fight air pollution