Study: Direct Evidence That Global Warming Causes More Global Warming

Scientists agree that an increase in atmospheric greenhouse gases causes the Earth’s temperature to rise, but they’ve also noticed that relationship seems to swing both ways: warmer temperatures also seem to correspond with an increase in greenhouse gases. But drawing conclusions about the nature of the relationship is tricky, because though scientists have seen a correlation, they haven’t been able to show causation.

Now, scientists believe they’ve untangled the relationship. In a paper published Monday in Nature Climate Change, researchers from the University of Exeter claim to have found direct evidence that as global temperatures rise, so does the atmospheric concentration of greenhouse gases, creating a positive feedback that in turn warms the Earth even more — basically, global warming creates more global warming.

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