Quote:
Originally Posted by GeoffC
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Agreed CO2 is higher these days, but consider the following.
According to this graph - at aourd 3.3 hundred thousand years ago there is a spike. so at that time you could have said.
'For 470,000 years carbon dioxide levels have been below this line, until the present day.....'
Add to that, the information that CO2 is (according to some sources) not the main contributing factor to climate change (They claim it could be water vapour) anyway, makes this graph and it's implications un-important (depending on which data you chose to believe).