Thirty-Eight Percent Of World's Surface In Danger Of Desertification

This is the Guadalquivir River as it passes through Seville, one of the areas most at risk of desertification in Spain. (Credit: Nesta Vázquez)

From Science Daily:

Science Daily (Feb. 10, 2010) — Researchers have measured the degradation of the planet's soil using the Life Cycle Assessment (LCA), a scientific methodology that analyses the environmental impact of human activities, and which now for the first time includes indicators on desertification. The results show that 38 percent of the world is made up of arid regions at risk of desertification.

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