A collection of satellite photos reveals the planet's beauty and vulnerability from threats such as desertification, sprawl, and pollution.
Nov 5, 2013 Wired
With water in increasing demand and unsustainable land use patterns threatening supplies, a new report claims that nearly 40% of the earth's surface is arid and in danger of desertification.
Feb 11, 2010 Science Daily
A new report estimates that desertification will expand up to 34% during the next century, enveloping an area the size of the United States.
Aug 20, 2009 Discovery
The Sahara desert is becoming increasingly green, according to satellite imagery -- which scientists are attributing to rising temperatures associated with global climate change.
Aug 4, 2009 National Geographic
<p>Officials in Africa have approved a plan to plant a "wall of trees" across the continent to prevent the southward spread of the Sahara desert due to winds and drought.</p>
Jul 10, 2008 Environmental News Network