European Colonizers Killed Enough Natives to Change Global Climate
The effect was so profound, it's now known as the Little Ice Age.
When Europeans arrived in the Americas, they caused so much death and brought with them so many diseases that they were able to change the global climate, a new study finds.
Over about 100 years in South, Central and North America, Europeans killed 56 million indigenous people, causing large areas of farmland to be abandoned and then reforested, researchers at University College London, or UCL, estimate. That increase in trees and vegetation across what is roughly the size of France resulted in a massive carbon dioxide decrease in the atmosphere, CNN reported, and a temperature shift.
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