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。
Tackling the water pollution at the head source of the rivers is not enough!
仅在河流源头治理污染是不够的！
Tackling the water pollution at the head source of the rivers is not enough!
仅在河流源头治理污染是不够的！
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