Glacier National Park
A little more than 100 years ago, there were as many as 150 glaciers strewn throughout Glacier National Park in Montana. By 2010, only 25 remained, and those glaciers are expected to disappear by 2030, if not earlier.
Many of the plant and animal species that call the park home require cold water, meaning the ecosystem of the park and the tourism industry around it may change dramatically when the glaciers are gone. Some once-populous fish species like the bull trout already are in decline as ocean temperatures rise. Streams fed by melting snow are reaching their spring highs and summer lows earlier than usual, meaning farmers have less water to irrigate late summer crops. And some small ski areas have shuttered, saying there isn't enough snow to stay open, the New York Times reports.