China's smog is an increasing cause of public discontent, writes Oliver Wild - and no wonder! New research shows that the country's air pollution is killing over a million people every year. Thanks to China's geography the problem is hard to solve, but the rapid rise of renewables and the slow demise of coal do offer the promise of cleaner, healthier future.
Shanghai is experiencing unprecedented levels of pollution. Last week fine particulate levels reached almost 20 times WHO guidelines, and they are still at dangerous levels. Matthew Currell reports on China's pollution crisis.