Quote:
Originally Posted by oil pan 4
That carbon isotope thing is only telling us what portion is released by man. We know we use a lot of carbon fuel, something to the tune of 15 quadrillion BTU per year.
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Fossil fuel only has carbon 12, and this shows that humans burning fossil fuels is what is causing climate change.
Burning biomass has a proportion of carbon 14. Volcanoes produce carbon 13.