Proper hand washing protects us from transmission of diseases. It is possible to do it the right way and save water at the same time.
A person uses up to 1.5 liters of drinking water in each hand washing., but it can be reduced to one-fifth of that.
More than 5 billion people could have difficulty accessing water by 2050.
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https://www.who.int/news/item/01-07-2021-billions-of-people-will-lack-access-to-safe-water-sanitation-and-hygiene-in-2030-unless-progress-quadruples-warn-who-unicef
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English