Jiminy Peak, Massachusetts
Credit: Stephan Savoia / AP

Temperature increases in the Northeast mean more rain than snow, even in the mountains. Approximately half the region's 103 ski areas could close within the next 40 years.

What they're doing: In 2007, Jiminy Peak, a small Berkshires resort, built one of the first private megawatt-class wind turbines in the U.S. The "Zephyr" powers much of the resort and surrounding area, generating 4,600,000 kilowatt hours annually.