https://www.youtube.com/watch?v=UatUDnFmNTY

httpswwwyoutubecomwatchvx1SgmFa0r04 IPCC Sources Petit et al 1999 Nature 399429436 and IPCC2000 Today 400 ppm CO 2 2 ppm CH 4 Atmospheric CO 2 has increased rapidly to levels above anything in Earths recent past

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