Air pollution is more dangerous than we thought

Obviously, air pollution is bad for everyone's health. That's the very definition of pollution. But a recent, very large, study of over 65,000 people shows that air pollution is much, much more dangerous than previously believed. This study, which is bigger and more detailed than previous research, looked primarily at women's health and found the risk of pulmonary and heart related problems to be almost directly proportionate to the pollution levels in different neighborhoods. Armed with this latest information, experts are pushing the Environmental Protection Agency to lower it's annual standard for the "fine particulates" that are used to measure air pollution levels.

Maybe I'm just really ignorant about pollution, but I've always thought it was made up of mostly microscopic particles. This article says that it would take only 30 of these particulates to equal the thickness of a human hair...that is scary big!