Plants growing on water help keep river clean

Plants grow on floating beds on a river in Wuxi, East China's Jiangsu province, Sept 14, 2010. The plants help keep the river clean. [Photo/Asianewsphoto]

Plants grow on floating beds on a river in Wuxi, East China's Jiangsu province, Sept 14, 2010. [Photo/Asianewsphoto]