Children play under a makeshift bridge that crosses the Nairobi River, March 11, 2008. With the world's population expanding, a goal of improving sanitation by 2015 is slipping out of reach, despite progress in nations such as China and a few big contracts. Experts say a part of the solution, especially to cut water-borne diseases for the rural poor, may lie in renewed and smarter exploitation of nature. Picture taken March 11, 2008. To match feature WATER-SANITATION/ REUTERS/Thomas Mukoya (KENYA)
REUTERS/Thomas Mukoya