From New York Times:
The quake killed at least 60,000 people, generating a response that has been heartwarming and inspiring, with even schoolchildren in China donating to the victims. Yet with little notice, somewhere between 300,000 and 400,000 Chinese die prematurely every year from the effects of outdoor air pollution, according to studies by Chinese and international agencies alike.
In short, roughly as many Chinese die every two months from the air as were killed in the earthquake. And the problem is becoming international: just as Californians can find Chinese-made shoes in their stores, they can now find Chinese-made haze in their skies.