人类实践活动产生的各种污水未经处理大量排放进江河湖海中造成的污染。由于超过自然水体自身洁净能力，造成水质严重下降water pollution

• 不解决水污染问题，南水北调，水利也会带来水害。

  If water pollution problems are not resolved, water conservation projects such as South–North Water Transfer Project will cause water damage.

• 今年底，可建成“三河三湖”流域水污染治理项目44个。

  At the end of this year, 44 projects to manage water pollution in the Huaihe River, the Haihe River, the Liaohe River, and Lake Taihu, Lake Chaohu, and Lake Dianchi will be constructed.