Wind generators at Pacific Hydro's Cape Bridgewater wind farm in Warrnambool, Australia, in May 2012. Each generator produces roughly enough energy to meet the annual needs of 12,000 households. Mark Dadswell/Getty Images hide caption

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Climate activists at a rally in Doha on December 1, 2012. Karim Jaafar/AFP/Getty Images hide caption

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Former Vice President Al Gore. Jon Kalish/NPR hide caption

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A condemned house in the Ocean Breeze area of New York City's Staten Island. Most homes in the seaside community were inundated by the ocean surge from superstorm Sandy. John Moore/Getty Images hide caption

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The redder the shading, the further above average were the temperatures in September. NOAA's National Climatic Data Center hide caption

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A farmer sifts through the drought-stricken topsoil of his Logan, Kansas, land in August 2012. John Moore/Getty Images hide caption

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Former South Carolina Republican Rep. Bob Inglis now runs the Energy and Enterprise Initiative. /Energy and Enterprise Initiative hide caption

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Pinot noir grapes are notoriously finicky about the weather, and climate change has winemakers in Oregon thinking about the future. Greg Wahl-Stephens/AP hide caption

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Somali girls line up to receive a hot meal in Mogadishu last year after the worst drought in the Horn of Africa in decades, compounded by war, put millions in danger of starvation. Roberto Schmmidt/AFP/Getty Images hide caption

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