Photo: Satellite-Photo Atlas Uses Digital Globe to Show Eco Damage

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Satellite images from 1972 and 2001 show how Africa's Lake Chad has been drying up over the past few decades.

A new "layer" of United Nations images in the popular digital globe Google Earth allows users to see this and other pairs of images showing environmental degradation at a hundred sites around the world.

Image courtesy UNEP Atlas of the Changing Environment

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