Beijing, September 29 (Youth.cn) - Photo taken at the source of the middle channel of the South-to-North Water Diversion Project, Danjiangkou Reservoir on September 24th. Clean and clear water and green water beautify the environment, thanks to the 6 key projects to reduce water pollution. To keep the ecological landscape, the water management targets different aims at upstream, midstream and downstream. Alongside upstream, pollution control is the key task, while near the midstream and downstream, avoiding over-exploitation and pollution emission are the main works. Photo/VCG