non-point pollution

例句：

1. 1. The non-point source pollution is a major environmental issue in the city.
   非点源污染是该市的主要环境问题。
2. 2. The government has taken measures to reduce non-point source pollution.
   政府已经采取措施减少非点源污染。
3. 3.The non-point source pollution is mainly caused by industrial emissions.
   非点源污染主要由工业排放引起。