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Media reactions to Boris Nemtsov's murder

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DEBATE

The Murder of Boris Nemtsov: Who Killed Charismatic Opposition Figure? (part two)

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DEBATE

The Murder of Boris Nemtsov: Who Killed Charismatic Opposition Figure?

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Dealing with returning jihadists: Is de-radicalisation possible?

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Noel Gallagher, Bryce Dessner and ‘David Bowie is’ in Paris

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China: New reform set to benefit migrants

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Caged children in Syria and dumpster diving in Ivory Coast

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We travel across the globe and meet the people behind the most fascinating environmental, health and technological innovations in a bid for sustainable solutions to our changing world. Every other Sunday at 8.40 pm.

DOWN TO EARTH

DOWN TO EARTH

Latest update : 2013-09-24

Sweden: Mining for urban treasure

In industrial cities, thousands of cables and pipes are left abandoned under our feet. It's a valuable source of metal that could be given a second chance. Join the team in downtown Sweden as we explore whether our cities are the mines of the future.

This week we're in Sweden, on a hunt for urban treasure. Beneath many of its downtown streets lies a bounty of abandoned metal trapped in forgotten cables and pipes.

We meet the Swedish prospectors who believe cities will be the mines of the future. Researchers from Linköping University have shown the amount of copper under the pavements is equal to that found in the country's traditional mines.

Today it's too expensive to dig up this network of underground infrastructure, which includes copper as well as iron and aluminium, but efforts are underway to change the economics of urban mining.

Austrian-based company Kabel-X has developed technology that can extract up to 400 metres of copper in one piece. As Sweden's telecommunications provider makes the switch to fibre optic cables, it could be the perfect opportunity to tap into this reservoir of metal and give it a second life.

By Mairead DUNDAS , Marina BERTSCH , Juliette LACHARNAY , Emilie COCHAUD

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Archives

2015-02-15 carbon emissions

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2014-09-21 environment

Global warming: A drowning planet

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