Climate change isn’t all that difficult to understand. A British scientist proved shortly before the U.S. Civil War that carbon dioxide absorbs heat, and a Swedish chemist doodled out the first equations involving fossil-fuel emissions before the 20th century even began. What was difficult to separate out, however, was identifying the human-driven signal within the noise of the vast, messy and natural climate system. We know that what we burn ends up in the atmosphere, driving up the Earth’s planetary fever. At least, at first it does. What happens to carbon dioxide after that?
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