CO2 ppm then and now?

Space/Science » in reply to The Day the Earth Nearly Died - Cause Global Warming

Occasional Reader — 4/27/2003 10:34:22 AM (archived)

I haven't seen that documentary, so can you clarify something for me? CO2 currently measures about 380ppm and is predicted to be around 500ppm by 2100, I believe. What were the CO2 concentrations at the time of the Permian extinction? Are there any prozy measurements? Same with methane concetrations then and now. Could we have some comparisons?

The whole thread (8 posts)

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