Water environment problems of Yangtze valley are caused by many factors, such as industry and agriculturepollution, city consumer pollution, soil and water loss etc.
长江流域水环境问题是由多种因素引起的，如工农业污染、城市生活污染、水土流失等。
2
Organic agriculture also creates less soil and water pollution and lower greenhouse gas emissions.
有机农业还减少了土壤污染和水污染，降低了温室气体排放量。
3
Chemical pollution will bring about a threat to agriculture and food chain, and consequently to human health.