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"Great Green Wall of Trees" Could Thwart Sahara's Desertification in Africa
The trees are meant "to stop the advancement of the desert," Senegalese president and project leader Abdoulaye Wade told National Geographic News during UN's Copenhagen climate conference.
In many central and West African countries surrounding the Sahara, climate change has slowed rainfall to a trickle, according to the UN's Intergovernmental Panel on Climate Change (IPCC).
Crops have died and soils have eroded, crippling local agriculture.
If the trend continues, the UN forecasts that two-thirds of Africa's farmland may be swallowed by Saharan sands by 2025.
"Trees are almost always formidable foes against encroaching deserts," said Patrick Gonzalez of the University of California, Berkeley's Center for Forestry.
That's because stands of trees act as natural windbreaks against sandstorms, and their roots improve soil health, especially by preventing erosion.
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