Guardian: Air pollution in Beijing has been described as "apocalyptic" this week with people choking their way through murky streets, short of breath and their eyes stinging from toxic air. But Beijing is just one of hundreds of cities, largely in Asia, where poisonous air is now the fastest growing cause of death in urban populations.
In the past few months there have been acute air pollution incidents reported in Bangladesh, Iran, Afghanistan, Nepal, and Pakistan. In Tehran, the desperate authorities...