Eco toilet

Photo: Thinkstock

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If You've Got 30 Minutes for the Environment...
Older toilets use as much as seven gallons of water with each flush—when less than a gallon can do the trick. Not ready to replace a gallon guzzler? Fill a plastic bottle with water and a bit of sand or gravel and submerge it in the tank (careful to keep clear of the stopper) for a do-it-yourself low-flow throne.
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LONG FORM
ONE WORD