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Episode
8
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le marc de café, nouvel or brun ?
Duration
13 min
Coffee grounds, the new brown gold?

Each day tonnes of coffee grounds are thrown away. Yet this raw material, with its ability to fertilise and deodorise, has a host of useful qualities. As compost, coffee grounds help oyster mushrooms grow. In China, an industrialist uses them to make impermeable synthetic textiles that absorb odours.