Wind is a clean source of renewable energy that produces no air or water pollution.
风是一种清洁的可再生能源，不产生空气和水污染。
There is no water pollution, is a clean source of energy.
水能没有污染，是一种干净的能源。
Is a major source of white pollution!
是白色污染的主要来源之一！
Disposal of nonbiodegradable waste is a primary source of pollution.
对非生物降解物的处理是污染的主要来源。
The lead pigments are a big source of lead pollution.
含铅颜料是主要的铅污染源。
Uncontrolled it is a serious source of air pollution.
如果不进行控制将造成很严重的环境污染。
It is a main source of air pollution in cities.
它是城市主要的空气污染源。
It is a main source of air pollution in cities.
它是城市主要的空气污染源。
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