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

itoggle caption Jon Kalish/NPR

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

itoggle caption John Moore/Getty Images

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

itoggle caption NOAA's National Climatic Data Center

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

itoggle caption John Moore/Getty Images

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

itoggle caption /Energy and Enterprise Initiative

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

itoggle caption Greg Wahl-Stephens/AP

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

itoggle caption Roberto Schmmidt/AFP/Getty Images

Waves pound a sea wall in Pacifica, Calif., during a storm in 2010. Small assumptions can make a big difference when putting a price-tag on future disasters. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Climate change as predicted in 1981. Grey shows predictions from global temperature rise via computer models run of Hansen et al 198. Red shows real world data taken since paper was published. Geert Jan van Oldenborgh and Rein Haarsma, KNMI, RealClimate hide caption

itoggle caption Geert Jan van Oldenborgh and Rein Haarsma, KNMI, RealClimate