Monday, February 18, 2008

Green lawns could lead to brownouts

Most people don't realize how closely power and water are linked.

In California, the water pumps that keep the Los Angeles area hydrated are the single largest users of power in the state, according to Gleick. Running a hot water faucet there for five minutes uses as much energy as keeping a 60-watt light bulb on for 14 hours, he said.

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Most types of power plants use water for cooling - a lot of water. About 40% of the freshwater used in the U.S. - or 136 billion gallons a day - is used for power generation, nearly as much as is used for crop irrigation, according to the U.S. Geological Survey. A typical nuclear or coal energy plant could use 30-40 million gallons of water a day.

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