Workers row a boat on the algae-filled Chaohu lake in Hefei, East China's Anhui Province, June 3, 2008. Recently, blue-green algae has been discovered in the west part of Chaohu Lake, which is China's fifth largest body of fresh water and the drinking water source for about 320,000 people. [Xinhua]

Algae-filled Chaohu lake is seen in this picture taken on June 4, 2008 in Hefei, East China's Anhui Province. Recently, blue-green algae has been discovered in the west part of Chaohu Lake, which is China's fifth largest body of fresh water and the drinking water source for about 320,000 people. [Xinhua]

(Xinhua News Agency June 6, 2008)