For Parched Times, a New Water Calculus

New York Times: In my article about efforts by Levi Strauss & Company to adapt to climate change by reducing its water consumption, I mention the company`s estimate that each pair of 501 Levi`s jeans will consume 919 gallons of water during its life cycle. That includes everything from irrigating the cotton crop, to rinsing the jeans during the manufacturing process, to lots of home launderings. But do those measurements go far enough? It turns out that measuring water use is just as tricky as measuring carbon......

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