What is climate change?

The USGS strives to understand how the earth works and to anticipate changes in how the earth functions. To accomplish this, USGS science aims to understand the interrelationships among earth surface processes, ecological systems, and human activities. This includes understanding current changes in the context of pre-historic and recent earth processes, distinguishing between natural and human-influenced changes, and recognizing ecological and physical responses to changes in climate.

Information on USGS climate change activities can be found at http://www.usgs.gov/global_change/ and Climate Change: The Science of Impacts. In addition, numerous fact sheets concerning various aspects of USGS scientific research about climate change can be found at http://www.usgs.gov/global_change/fact_sheets.asp.