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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 nikdaheratik on Friday June 17, 2016 @01:21AM (#11920824)
The methane was primarily caused by decaying biomass falling to the ocean floor. It didn't exist at the time the CO2 levels were higher.
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