Guardian: Even through the soupy Beijing smog, it is impossible to mistake the ebullient figure shaking hands, signing autographs and barking at startled passersby: "Come on, two cans for each one free fresh air. Open it and drink it and breathe it! It keeps you fresh the whole day!"
It is the kind of offer that has made Chen Guangbiao a household name in China: giving away thousands of tins of air to raise awareness of China's pollution. "If we don't act in the next 10 years, our descendants will have...