Via MetaEfficient, check out Scorecard, the Pollution Information Site. You can type in your zip code and find out the air quality (and much more pollution data) where you live, including a map of pollution sources and comparisons to national averages. Very handy. Oh, and scary.
Here’s the pollution situation where I live. The top polluter in my county is Rexam Beverage Can Co. The top chemical pollutants are glycol ethers. We’ve got two Superfund sites polluting our water.
How’s your home turf doing?