Quote:
Originally Posted by t vago
...The atmospheric carbon dioxide inventory is something on the order of 750 gigatons, or 750,000,000,000 tons. Manmade contributions are about 6 gigatons, or 0.8 percent of that above number with the 10 zeros in it.
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That is 6 gigatons per year, so we add about 1% per year, starting many years ago.