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Glaciers in Yellowstone and Yosemite on track to vanish within decades, UN report warns

A third of the world’s glaciers in culturally and naturally significant World Heritage sites will almost completely disappear by 2050, a United Nations climate report warns. Without further reductions in greenhouse gas emissions, half of World Heritage glaciers could almost completely vanish after another 50 years. 

But if humanity limits the global temperature increase to 1.5 degrees Celsius (2.7 degrees Fahrenheit) above preindustrial levels, two-thirds of World Heritage glaciers could survive, the report said. That 1.5 C increase matches a goal of the Paris Agreement, which countries agreed to in 2015 at the U.N. Framework Convention on Climate Change.

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