Water hyacinth in Guben town of Jinping county, Southwest China's Guizhou province, clogs waterways, July 15, 2013. The area where Wuxia River and Qingshui River meet is almost covered by water hyacinth, choking fish and causing hardship for local fish farmers. The local government has sent salvage ships to remove the aquatic plant, but the large area makes cleanup difficult. [Photo/Xinhua]