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This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?

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The drought is big news in California.

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But California's not alone, climate change will exacerbate water issues.

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So what should we do to save water?

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Turns out that most of us don't really know, according to research in the Proceedings of the National Academy of Sciences.

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Shahzeen Attari at Indiana University surveyed more than 1,000 Americans online.

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Respondents were first asked what they could do to conserve the most water.

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The vast majority chose curtailing an activity, such as taking a shorter shower.

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They didn't give much weight to efficiency measures that involve changing the devices themselves.

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Such as retrofitting a toilet, which is in fact the most significant water-saving change the average person can make.

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Participants also tended to underestimate the water required for activities such as car washing or washing clothes.

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For instance, the average guess was that a standard washing machine uses 14 gallons of water, it actually uses about 34.

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These results indicate that Americans don't have a good handle on where they use the most water.

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Such awareness is critical today in California, but is likely to become important for many other regions in the not-too-distant future.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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