Technology
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Low-flow shower heads (sometimes called energy-efficient shower heads as they also use less energy, due to less water being heated) Buy here.
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Low-flush toilets, composting toilets and waterless urinals, which can have a dramatic impact in the developed world, as conventional Western toilets use large volumes of water.
Buy here.
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Faucet aerators, which break water flow into fine droplets to maintain "wetting effectiveness" while using less water. As a bonus, they reduce splashing while washing hands and dishes. Buy here.
