In the photo taken Sunday, July 17, 2011, in the Korogocho slums of Nairobi, Kenya, with Joseph Irungu, back right, and one of his 50 workers push a cart to dumps effluent from slum pit latrines into ... more 
In the photo taken Sunday, July 17, 2011, in the Korogocho slums of Nairobi, Kenya, with Joseph Irungu, back right, and one of his 50 workers push a cart to dumps effluent from slum pit latrines into the local water course, as children play on the shore. On Tuesday July 19, 2011, at the AfricaSan Conference in Kigali, Rwanda, the Bill & Melinda Gates Foundation announced dlrs 42 million U.S. in grants to encourage innovation in the capture, storage and re-purposing of waste as a potential energy resource. About 1.5 million children are believed to die each year from disease contracted from bad sanitation and the Gates Foundation believes most of these deaths could be prevented with clean drinking water and improved hygiene. (AP Photo/Khalil Senosi) less 
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Associated Press | Photo By Khalil Senosi
Tue, Jul 19, 2011 11:09 AM EDT