This is an interesting representation of what traces would remain much after the humans have gone from the earth.
www.worldwithoutus.com/did_you_know.html
www.worldwithoutus.com/did_you_know.html
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http://ed.sc.edu/ite/dickey/nassp/nassp.html
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http://www.epa.gov/ozone/science/q_a.html http://www.epa.gov/ozone/science/effects/index.html For Further Reading http://www.met.sjs...
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