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DennisP
on Sept 19, 2014
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Can the World Really Set Aside Half of the Planet ...
There are also reasons to think the Permian-Triassic was caused by volcanic activity burning a lot of coal.
http://www.sciencedaily.com/releases/2011/01/110123131014.ht...
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http://www.sciencedaily.com/releases/2011/01/110123131014.ht...