consequently, co2 levels at around 1,000 to 2,300 ppm were actually low enough to promote glaciation in the southern continent of gondwana.
consequently, co2 levels at around 1,000 to 2,300 ppm were actually low enough to promote glaciation in the southern continent of gondwana.
carbon dioxide in earth's atmosphere:51
decreasing co 2 concentration, with a tipping point of 600 ppm, was the primary agent forcing antarctic glaciation.