The less litter we drop, the cleaner our hometown will be.

我们丢弃的垃圾越少，我们家乡就会越干净。

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But the cleaner air has come at a cost.

但是这更清洁的空气也是有代价的。

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If that's not enough, then I break out the cleaner.

如果光用水不够，那我会用清洁剂。

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"Development is a right and that should continue but that perhaps paths where there could be a reconciliation of the objective of poverty reduction, enhanced standards of living, a life of greater dignity in developing countries can be reconciled with climate objectives by shifting the sources of energy away from the fossil fuels to the cleaner and lower carbon emissions.

VOA: standard.2009.09.01

I've already taken your shirt to the cleaner's.

我已经把你的衬衫拿去洗衣店了。

I've already 课堂 - SpeakingMax英语口语达人

Then here's the favorite of all time, vacu-pants, attached via the hose to your vacuum cleaner.

这是最受喜欢的,真空裤法,需要与真空吸尘器的管子相连

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This is partially being done by switching coal-fired plants to the cleaner-burning natural gas.

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After all, if asked, most people would say that they favor the cleaner production of electricity.

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Near-term and relative near-term ROI is the cleaner equation for Wall Street investors as well.

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