NASA
The stratospheric ozone layer protects life on Earth by absorbing ultraviolet light. An image of the ozone hole photographed by satellite on September 17, 1979.
NASA
The ozone hole photographed by satellite on October 1, 2010.
NASA
Drought has taken a toll on crop lands in Southeast Australia during many years this decade. This image was taken in mid-September 2005.
NASA
Images of drought conditions in Southeast Australia taken in mid-2009
NASA
Global temperatures 1880 - 1889
NASA
Global temperatures 2000 - 2009
NASA
Changes in the Aral Sea. This image was taken on August 19, 2000.
NASA
The Aral Sea photographed on August 26, 2010.
NASA
Lake Powell, Nevada, the main supplier of water to Las Vegas. Photographed in 1999.
NASA
Water in Lake Powell. Photographed in 2010.
NASA
Comparison of sea ice around Antarctica in 1999 and 2010.