why is it a problem that it takes so much water to produce 1kg of beef – something like 15,000 liters – if the cows just pee it all back out anyway?
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Adding to other good answers, when water is recycled back into system, it spreads instead of being localized into a place to easily harvest.
When it’s spread it’s much difficult to get it back and takes a lot of energy and we don’t have that much cheap energy.
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