EPA: Pollution Cancer Risk Is Falling

"Thirty-six out of 1 million U.S. residents will develop cancer due to breathing toxic air pollution, according to estimates by the Environmental Protection Agency (EPA)."

"The estimate is based on 2002 levels of air pollution from gasoline cars, factories, and other sources. It represents a drop from a 2006 estimate, when the EPA predicted an average of 42 cancer cases per million people based on 1999 air pollution levels."