Don’t get too squeamish: If you’re on a public water system then I can assure you that the water that pours out of your spigot isn’t bottled by magic elves living at the top of a glistening glacier. Even the cow to your right knows that. (Don’t judge me, cow.)
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Scientists in the US have developed technology that can turn cow manure into drinkable water.
The anaerobic digester takes manure and passes out water which is clean enough for livestock to drink – by removing compounds such as ammonia.
Nutrients are also pulled from the manure during the process which can be turned into fertiliser.
Professor Steve Safferman, from the Michigan State University team, said: “If you have 1,000 cows on your operation, they produce about 10 million gallons of manure a year.
“About 90% of the manure is water but it contains large amounts of nutrients, carbon and pathogens that can have an environmental impact if not properly managed.”
The system produces 50 gallons (227L) of water for every 100 gallons (455L) of manure digested.