Comment la demande pour le sable tue les rivières (BBC)

Illustration: BBC

"You cannot have concrete without sand. River beds are being dug up across Africa to fuel a building boom, with little thought for what this means for the health of the river, and those who depend on it, as Harriet Constable found in Kenya.
Sand. The word conjures happy holiday memories: building castles from it; watching nervous crabs scuttle across it; digging giant holes in it, and then hiding in them and leaping out at opportune moments to terrify unknowing relatives. Sand is the make up of glittering beaches, hundreds of thousands of years of weathering to create millions and millions of tiny, sparkling, and yet seemingly insignificant particles. Sand is infinite, surely. And yet the world is running out."

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Lisez ici le reportage de la BBC:

http://www.bbc.com/news/magazine-41123284

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