Scientists mainly blame fertilizer and other farmrunoff, sewage and fossil-fuel burning.
科学家们主要归咎于肥料和其他的农业排放物、污水以及石油燃烧等原因。
2
The effects of country living contamination, urban runoff contamination, livestock and poultry farmrunoff and other pollutions on the water environment make the water body suffering hard.
加上农村生活污染、城市径流污染、畜禽养殖污染及农田径流等非点源污染的影响，水环境已难承其重。
3
The characteristics of nitrogen and phosphorus loss from rice field by natural rainfall runoff were studied in Shuangqiao Farm of Jiaxing city, located at the Yangtz river delta region.