How do toxic chemicals move around the planet?
Read Elizabeth Grossman's article in Scientific American for awesome explanations.
Swimmers, hoppers and fliers: How do toxic chemicals move around the planet?
By Elizabeth Grossman
Toxic chemicals created by human activity reach unusual concentrations in the Arctic, among other places
http://www.scientificamerican.com/article.cfm?id=how-do-toxic-chemicals-move-around-planet&SID=mail&sc=emailfriend
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