Every day after his morning run, Adam Reutens-Tan washes under a half-full camping shower hooked on the ceiling of his bathroom.
The modified shower, which uses just four litres of water, is one of several ways the Reutens-Tans family conserve water as part of a countrywide push to cut Singapore's daily consumption by 8% by 2030.
The nation currently uses 141 litres per person each day - about enough for two typical eight-minute U.S. showers, according to Harvard University statistics.
Singapore, a steamy, low-lying island city-state, is the fifth most likely country in the world to face extremely high water stress by 2040, according to the U.S.-based World Resources Institute.
And it is hardly alone.
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