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Africa Can a 4,000-mile wall of trees stop Sahara Desert's drift?

The pan-African Great Green Wall project aims to build a literal wall of trees to stop the Sahara Desert's southward creep. But is the idea too good to be true? 

By Kyle Benjamin Schneps, Guest blogger / April 30, 2013

Finbarr O'Reilly / Reuters

•A version of this post ran on the blog, Africa in Transition. The views expressed are the author's own.