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A comment on Antarctic CO2 Hit 400 PPM for First Time in 4M Years. Parent comment

Re:Antarctic CO2 Hit 400 PPM for First Time in 4M Years by eloff on Friday June 17, 2016 @04:22AM (#11921265)
It did. That was part of the sad chain of events causing one of the biggest mass extinctions ever 250m years ago. Its one of the theories anyway.
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