此外，该区将改善白洋淀的水质，白洋淀是中国北方最大的淡水湿地之一。

What's more, the area will improve the water quality of Baiyangdian Lake, one of the largest freshwater wetlands in North China.

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新的咖啡种植技术正在污染当地的水质。

The new coffee-growing techniques are polluting the water locally.

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最近一次调查发现那里的水质污染比本国其他任何地区都严重。

A recent study found that water pollution in the region was worse than in any other region in the country.

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