Polar bears live in 19 populations across the Arctic and are found in Canada, the United States, Russia, Greenland and Norway, according to conservation organization Polar Bears International. They found that the number of days polar bears were forced to go without food increased as greenhouse gas emissions accumulated. That allowed them to calculate the impact of cumulative emissions on the rate of polar bear survival. This would be about 60-plus gigatons over the 30-plus year life span of a polar bear in the southern Beaufort Sea. “They found that when we emit more carbon dioxide, it directly affects how many polar bear cubs can survive.

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Persons: Steven Amstrup, Kt, Katharina M Miller, Amstrup, ”, Cecilia Bitz, Kirsten Zickfeld, Zickfeld, ” Amstrup Organizations: CNN —, Polar Bears, Kt Miller, Polar, University of Washington, University of Wyoming, ESA, US Department of Interior, Bears, CNN, Department, US Department of, Simon Fraser University Locations: Canada, United States, Russia, Greenland, Norway, Chukchi, Hudson Bay, Beaufort