Created by a host of organizations (Environmental Defense Fund, Natural Resources Defense Council, Sierra Club, Union of Concerned Scientists, US Public Interest Research Group, World Resources Institute, and World Wildlife Fund), this site seeks to provide evidence of the "fingerprints" and "harbingers" of global warming. A clickable map of the world enables users to take a closer look at geographic regions, at specific examples of "fingerprints" (e.g., heat waves, sea level rise, melting glaciers, and Arctic and Antarctic warming) and "harbingers" (spreading disease, earlier arrival of spring, range shifts and population declines in plants and animals, bleaching of coral reefs, extreme weather events, and fires). While it is unclear that any specific event may be explained by global warming, the combination of events highlighted at this page provides powerful fodder for further thought.