Quote:
Originally Posted by PR_Glen
not because of pollution though.. that has never happened.
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Not by pollution per se, but the biggest mass extinction that wiped out over 95% of all life on Earth was due to the planet warming by 10 degrees Celsius caused by CO2 and methane being released. Volcanoes released CO2 which caused a rise in the planet temps which in turn caused methane to be released triggering even higher temps.
Here's an excellent video by Thom Hartmann about it....