Despite improvements in clean water supply , China says it still ` ` lagging far behind '' One child dies every 20 seconds because of poor water sanitation according to the U.N. New water detection techniques using mobile phones can speed up detection and save lives .
Despite improvements in clean water supply , U.N. says sanitation still `` lagging far behind '' One child dies every 20 seconds because of poor water sanitation according to the U.N. New water monitoring techniques using mobile phones can speed up maintenance and save lives .