These indentions in the concrete divert excess water from the surface to reduce the amount of water between tires and the runway or road.

这些锯齿型沟槽能够间路面上的水排走，从而减少轮胎与路面之间的水分。

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As a result, the government is encouraging people to reduce consumption, and put excess water to better use.

CNN: Man-made desert lake: Ecological paradise or disaster?

My favorite example of this environmental excess is the ground water cleanup efforts around Sacramento, California, where one aerospace company has managed to reduce the incidence of rocket-fuel ingredient perchlorate to four parts per billion.

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