The United States wastes energy equal to the fuel demand of Barbados on a practice with no proven health benefit: washing hands in hot water rather than cool, a study says.
It doesn’t kill germs better than cooler water, but turning tap temperatures high, the U.S. burns carbon equal to the emissions of Barbados.
Built-In Dishwashers Versus Hand-Washing: Which Is Greener?
Washing hands with cold water kills germs just as effectively as hot water - NZ Herald
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PPT - The Study of Energy Indicator in Hot-Humid Climate Office
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Food Safety Talk
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What are some good ways to save energy in your home? - Quora
Why must food businesses provide warm water for handwashing?