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Are falling commodity prices threatening the recycling industry? Manuela Saragosa speaks to Ranjit Baxi, president of the London-based Bureau of International Recycling. She also hears from David Steiner, the boss of Waste Management in the US, the world's largest recycler, on the challenge of getting us to sort our trash. And Venetia Rainey reports from Beirut on the city's mounting piles of rubbish.

(Photo: Aluminium cans for recycling, Credit: Philippe Lopez/AFP/Getty Images)