as measured in the ice cores, co2 concentrations from the last 400,000 years - that's the last five glacial cycles - have never been as high as they are now. they rarely pushed 350ppm, right now we're pushing 400
graph
http://en.wikipedia.org/wiki/File:Vostok_Petit_data.svg
great article & more graphs: http://www.daviesand.com/Choices/Pre...ning/New_Data/
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I am postulate one
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11-07-2012Last edited by blumpkin blownuts; 11-07-2012 at 01:11 AM.
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DogManz
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11-07-2012according to the graph that you just posted thay're only at about 285 and have been higher no less than two times in the last 400,000 years
Originally Posted by blumpkin blownuts
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DogManz
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11-07-2012I didn't realize we'd had cars that long
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