Analysis of drill cores links variations in CO2 40M years ago to changes in global temperatures; questions as to the source of CO2
Green Car Congress
NOVEMBER 11, 2010
“Bijl et al.were able to calculate absolute CO 2 levels, indicating that the baseline level was already 1000 to 2000 parts per million by volume (ppmv) in the Eocene (versus 390 ppmv today and 270 ppmv before industrialization).
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