More than 10,000 people have been mobilized in the Chinese city of Qingdao to clean up green algae, which have invaded the Olympic sailing venue. Coastal areas and lakes in China see frequent algae blooms, often caused by the discharge of nitrogen-rich chemical pollutants, sewage and fertilizers in the water. But Wang Shulian, of Qingdao’s Oceanic and Fishery Department, put the presence of the algae down to the temperature of the water and its salinity. Chinese authorities blame global warming for their algae problems, especially when they were discovered to have poored all their sewage into that same area – scientists diagnosed this as the real cause for algae bloom… This thing happen in 2008. Check out how it looked like. Enjoy.