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It’s time to bring ‘pee-cycling’ back September 25, 2026 Every time you go to the toilet, you could be flushing away a valuable resource – your urine. Today, we see urine as a waste product – but that wasn’t always the case. Historically, it was a highly valued commodity, used to dye cloth, tan leather and make gunpowder. Roman writer Pliny the Elder even recommended people use it to whiten their teeth (though don’t try that one at home). But now, we see our pee as an unseemly bodily fluid that
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