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By 2030 all of the park's namesake glaciers could be gone, according to the Natural Resources Defense Council and the Rocky Mountain Climate Organization. While these organizations don't claim to know all the harm that could be caused by the disappearance of the ice fields, one concern is a devastating increase in forest fires. Glacier National Park is home to more than 700 miles of hiking trails, 762 lakes and the famed Going-to-the-Sun Road, which offers a scenic drive over the Continental Divide.
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If you want to see the storied snowy peak, you had better go before it melts. Since 1912, 82% of the ice fields have disappeared. And they could all be gone between 2015 and 2020 if the ice continues to recede at its current pace, according to Lonnie Thompson, professor of geological sciences at Ohio State University.
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According to a study by the U.S. Geological Survey, two-thirds of the entire polar bear population could disappear in 50 years if the Arctic sea ice continues to melt at its current pace. Churchill's furry residents are already showing signs of environmental stress. Global warming is causing the Hudson Bay ice to break up three weeks earlier and freeze over two weeks later than it did 20 years ago. This shortens the animals' seal-hunting season and leaves them less nourished during the summer months.
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But Lake Mead's days may be numbered. Its water level is at its lowest in 40 years. While variation in elevation is normal, some scientists believe global warming is causing less snow and seasonal melting, which decreases water runoff into the lake. Indeed, there's a 50% chance Lake Mead will be dry by 2021 if the climate changes as expected and future water usage isn't curtailed, says a study by the Scripps Institution of Oceanography, University of California San Diego.
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| Glacier National Park | Mount Kilimanjaro | Churchill, Manitoba | Lake Mead, Nevada | Mauritius | The Maldives |

6 Destinations to See Soon | |||||
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| Glacier National Park | Mount Kilimanjaro | Churchill, Manitoba | Lake Mead, Nevada | Mauritius | The Maldives |