The topmost graphic demonstrates the historically very-low levels of atmospheric CO2 found in our current atmosphere. Clearly the biosphere of Earth evolved under generally much higher levels of CO2. Modern high-tech greenhouses use expensive CO2 generators to boost the levels of CO2 to up to 3 X atmospheric levels -- for more optimal growth of a wide variety of plant life.
The modern obsession with "pre-industrial levels of CO2" displays a profound ignorance of this planet's atmospheric and biological history, as the graphic above demonstrates. Closer inspection of the motives of the leaders of the carbon hysteria orthodoxy demonstrates monetary payoffs via carbon trading, international carbon ransom payments, and other economic maneuvers of questionable legality and wisdom.
from Al Fin
the blog entry also talks about converting CO2 into non-gaseous forms of carbon, and other climate controlling technologies that could be developed. personally I don't think we should screw with Mother Nature any more than we are already until we know WAY more about climate systems.
Nice graph...please show me on your graph at what point this planet's climate was able to support human existence? Mother Nature doesn't give a flying fuck about whether humans live or die...she will go on...THAT is not the question...
There were mammels alive during the Cretacious. I don't know if there were any around before that or not.