If you compare some of the photographs which can be found on NASAs
website, you can really see how human beings have changed the appearance of our world over the years. The time difference between these images ranges from five to 100 years. Incredible stuff.
Pedersen Glacier, Alaska. Summer, 1917 summer, 2005
Aral Sea, Central Asia. August, 2000 August, 2014
Lake Oroville, California. July, 2010 August, 2016
Carroll Glacier, Alaska. August, 1906 September, 2003
Powell Lake, Arizona and Utah. March, 1999 May, 2014
Bear Glacier, Alaska. July, 1909 August, 2005
Forests in Rondonia, Brazil. June, 1975 August, 2009
McCarty Glacier, Alaska. July, 1909 August, 2004
The Dasht River, Pakistan, August, 1999 June, 2011. The Mirani Dam supplies clean drinking water and power to the surrounding area. The dam also helps support local agriculture.
Matterhorn Mountain in the Alps, on the border between Switzerland and Italy. August, 1960 August, 2005.
Mabira Forest, Uganda. November, 2001 January, 2006.
Toboggan Glacier, Alaska. June, 1909 September, 2000.
Great Man-Made River, Libya, April, 1987 April, 2010. This is the greatest engineering project in the world: a network of pipes, aqueducts and wells more than 500 metres deep. The water system provides the desert area with water.
Qori Kalis Glacier, Peru. July, 1978 July, 2011.
Mar Chiquita Lake, Argentina. July, 1998. September, 2011.
Muir Glacier, Alaska. August, 1941 August, 2004.
Uruguay Forests, March, 1975 February, 2009. Uruguay has managed to grow its forested area from 45,000 hectares to 900,000 hectares. However, this has had the effect of a loss of plant and animal diversity.