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see Creeping environmental stress fueled by volcanic eruptions and global warming was the likely cause of the Great Dying 250 million years ago, said USC doctoral student Catherine Powers.
http://cinziamazzamakeup.com/?x=dove-comprare-Viagra-generico-50-mg-a-Verona Writing in the November issue of the journal Geology, Powers and her adviser David Bottjer, professor of earth sciences at USC, describe a slow decline in the diversity of some common marine organisms.
http://maientertainmentlaw.com/?search=cheap-20mg-levitra Obviously, this wasn’t a human-caused event, but it demonstrates just how catastrophic such a catastrophe can be. As this NASA article explains, in the Great Dying, up to 90% of marine species and up to 70% of land species were wiped out. All life on Earth almost ended, even as it was still beginning, and global warming seems to have been one of the reasons why.
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