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Global Warming

From 1880 to 2012, the Earth warmed by 1.5°F (0.85°C), dramatically reversing a long-term millennial cooling trend.[1] The physics behind the Earth’s temperature imbalance is well established. Scientists first determined that greenhouse gases in the atmosphere trap heat near the Earth's surface in the 19th century. Since the late 1970s, scientists have known that global warming is underway due to the increase in greenhouse gases from human activities.

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