Quote:
Originally Posted by jimjamuser
Even I can answer that graph in your YOU/Tube insert. The bottom axis is in MILLIONS of years, which makes it useless to a discussion about the last 15 years that I am saying that Climate Scientists are worried about. I am NOT a Paleantologist (I can't even spell it right), but I would GUESS that as the Earth COOLED the oxygen and nitrogen gas atoms replaced the CO2 atoms. And since we HUMANS breathe O2 then we were able to exist.
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Plants today suffer from lack of sufficient CO2, which is why most commercial greenhouses (worldwide) use CO2 enrichment -- even the Villages greenhouse. We are far below the average level of earth's CO2 history -- and far too close to the CO2 red-line-of-death. We should celebrate CO2 - not demonize it.