This has been studied for a long time. Over the long haul, there are multiple drivers of warming. In past geologic ages a combination of things moved temperatures, which could then release more CO2. The warming we see today is of a different nature. It’s orders of magnitude faster and stems from human-caused emissions.

Adviser, author, speaker on how businesses can (profitably) solve the world's mega-challenges. Author: The Big Pivot & Green to Gold

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