Scientific American: In the last 15 years 200,000 hectares of the Mau Forest in western Kenya have been converted to agricultural land. Previously called a water tower because it supplied water to the Rift Valley and Lake Victoria, the forest region has dried up; in 2009 the rainy seasonfrom August to Novembersaw no rain, and since then precipitation has been modest. Whereas hydropower used to provide the bulk of Kenyas power ongoing droughts have led investors to pull out of hydro projects; power rationing and...