Therefore, the primary pollution control objective must be point source pollution and diffuse source of domestic wastewater in rural areas.

因此水污染控制必须以点源污染和农村生活面源污染为双重控制目标。

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The kind of the environmental hormone, the pathway of pollution, primary pollution source and damages were reviewed, and strategies of pollution control were suggested in...

主要叙述了环境激素的种类、污染途径、主要污染源、危害，并提出了污染控制及其防治对策。

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During the air pollution red alert, the Beijing Commission of Education ordered all kindergartens, primary schools and middle schools to suspend classes.

在空气污染红色预警期间，北京市教委下令让所有幼儿园、小学和中学停课。

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The U.S.Environmental Protection Agency,or EPA, lists stormwater as the primary cause of water pollution in the United States, and encourages local communities to develop management plans to treat run-off before it pollutes their rivers, lakes or streams.

VOA: standard.2010.08.04

According to Kim, pollution is one of the primary concerns on the local level.

BBC: Travellers�� impact on coral reefs