1) http://guymcpherson.com/2014/01/climate-change-summary-and-update/
2) click here
4) https://en.wikipedia.org/wiki/Permian--Triassic_extinction_event
5) https://en.wikipedia.org/wiki/Canfield_ocean
9) http://arctic-news.blogspot.com/
(Article changed on November 28, 2015 at 09:25)
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