Some information here: http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earths_atmosphere http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earths_atmosp... Also ha

Some information here: http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earths_atmosphere http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earths_atmosp... Also have a look at http://en.wikipedia.org/wiki/Greenhouse_gas#Global_warming_potential http://en.wikipedia.org/wiki/Greenhouse_gas#Global_warming_p...: "Carbon dioxide has a variable atmospheric lifetime, and cannot be specified precisely. Recent work indicates that recovery from a large input of atmospheric CO2 from burning fossil fuels will result in an effective lifetime of tens of thousands of years." The usual disclaimer about the accuracy of information on Wikipedia applies of course ;-)