Scientists also note that geologically speaking, the Earth is currently in a âCO2 famineâ and that the geologic record reveals that ice ages have occurred when CO2 was at 2000 ppm to as high as 8000ppm. In addition, peer-reviewed studies have documented that there have been temperatures similar to the present day on Earth when carbon dioxide was up to twenty times higher than todayâs levels. And, a peer-reviewed study this year found that the present day carbon dioxide level of 400 ppm was exceeded â without any human influence â 12,750 years ago when CO2 may have reached up to 425 ppm.
Princeton U. Physicist Dr. William Happer and NASA Moonwalker & Geologist Dr. Harrison H. Schmitt wrote on May 8, 2013 in the Wall Street Journal: âThanks to the single-minded demonization of this natural and essential atmospheric gas by advocates of government control of energy production, the conventional wisdom about carbon dioxide is that it is a dangerous pollutant. Thatâs simply not the case.â
âThe cessation of observed global warming for the past decade or so has shown how exaggerated NASAâs and most other computer predictions of human-caused warming have beenâand how little correlation warming has with concentrations of atmospheric carbon dioxide. As many scientists have pointed out, variations in global temperature correlate much better with solar activity and with complicated cycles of the oceans and atmosphere. There isnât the slightest evidence that more carbon dioxide has caused more extreme weather,â Happer and Schmidt wrote.
Princetonâs Dr. Happer, who has authored 200 peer-reviewed scientific papers, explained in Senate testimony in 2009 that the Earth is currently in a âCO2 âfamine.â Happer explained to Congress: âWarming and increased CO2 will be good for mankindâ¦âCO2 is not a pollutant and it is not a poison and we should not corrupt the English language by depriving âpollutantâ and âpoisonâ of their original meaning,â Happer added.
http://www.climatedepot.com/2013/05...only-a-big-yawn-climate-depot-special-report/
When was the last time the atmosphere had over 400 ppm CO2?