Collecting rainwater for use on the garden reduces municipal water use.

收集雨水用于浇灌花园，以节约自来水。

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Municipal leaders are well-positioned to influence land use, building standards, water and sanitation systems, and the enactment and enforcement of health-promoting legislation.

市政领导可以改进土地使用、建筑标准、用水和卫生系统，制定并实施保健法规。

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This discovery forced city officials to use nearby Lake Houston and Lake Conroe for municipal water instead of the aquifer.

这项发现迫使城市官方用邻近的休斯顿湖和康罗湖代替含水土层，成为该市主要水源。

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The idea is to experiment with projects that pay farmers to reduce nutrient pollution, using money that would otherwise have been spent on expensive technology for use by institutions such as municipal water authorities.

ECONOMIST: Nutrient pollution