Finnish engineers have poured pig manure into a contaminated pond next to an old mine, saying the bacteria in the slurry will clean up metals in the water.

为了治理一个被附近旧矿井所污染的池塘，芬兰工程师日前向池水中倾注了大量的猪粪浆。这样做是因为猪粪浆中包含的细菌能将池水中的金属物质清理干净。

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Please clean up this pig sty!

请你把猪窝打扫干净。

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He who scrubs every pig he sees will not be clean himself.

见猪就擦洗的人，自己也干净不了多久。(近墨者黑)。

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Thanks to the solar heater, a shower is a daily possibility, and the biogas digester -- which converts human and pig waste to a clean gas that can be pressurized -- has enabled cooking and lighting.

CNN: 'Green' revolution under way in rural China

Forget to clean up and your house is a pig pen.

WSJ: New Yorkers boldly flout law to keep pigs