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Fashion designer Dame Vivienne Westwood has revealed her secret for staying youthful…she only bathes once a week. Speaking at a fashion event in Paris, the 76-year-old designer told reporters that people shouldn't 'wash too much'.

Environmental activist, Donnachadh McCarthy, agrees. He thinks that the water saved by showering less frequently is an important way of fighting climate change. He tells us how often he takes a shower and how he keeps clean in between.

(Photo: Woman washing her hair. Credit: Getty Images)