MentalFloss: A Short History of Air Pollution
by Michael Graham Richard, Ottawa, Canada 
on 10.23.06
Our friends at MentalFloss have a post inspired by a story we did on how bees were used to test air pollution in airports. They look at air pollution from 900 B.C. in Iraq to the effects of coal a few centuries ago (you could lose your head!). Interesting stuff.
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For some reason I doubt they really would have cut off your head over something as necessary as burning coal.