DanSchuhmacher
Created page with "<br>When we think of air pollution, we often think of smoke pouring out of smokestacks and the unsightly brown haze that hangs over lots of the world's cities, from Los Angeles to Beijing. But in recent years, scientists have found rising proof of health dangers from part of air pollution that we don't see, and that isn't yet regulated underneath federal air quality requirements. Along with visible emissions, the burning of fossil fuels and other types of combustions cre..."