他们保持我们的空气清洁，减少噪音污染，改善水质，提供食品和建筑材料。
They keep our air clean, reduce noise pollution, improve water quality and provide food and building materials.
众所周知，使用清洁能源在减少污染方面发挥着重要作用。
As is known to all, using clean energy plays an important role in pollution reduction.
解决环境污染问题很大程度上取决于我们是否能合理地使用清洁能源。
Solving environmental pollution depends in large measure on whether we can use clean energy in a reasonable way.
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