evidence: SOURCE: Global Warming Is Driving Polar Bears Toward Extinction, Researchers Say by Henry Fountain, Climate, New York Times, July 20, 2020 KEY TAKE AWAY: Sea-ice loss due to global warming is the most important threat to long-term survival and reproduction of polar bears. Under a high greenhouse gas emissions scenario, all but a few polar bear subpopulations are at risk of extinction by 2100. In the moderate greenhouse gas emissions scenario, some polar bear subpopulations could persist through the century. [...] The long-term survival of polar bears is threatened by loss of sea-ice due to global warming, new study confirms, Edited by Nikki Forrester, Climate Feedback, July 27, 2020