To get a sense of how China's air quality compares with the rest of the world, there's a new map of global air-particulate pollutionfrom Canadian scientists using National Aeronautics and Space Administration satellite data. The verdict: It doesn't look good.

Eastern China's industrial area is just about the reddest part of the map, meaning it has the highest concentration of particulates. That doesn't bode well for the hundreds of millions of people there. And if you're in the middle of that red zone, you'd have to travel...