Costing the Earth Episodes Available now
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High Speed Hell?
How much disruption will a new high speed rail line really cause? Tom Heap reports.
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Waters of Arabia
Will Yemen be the first nation to run out of water? Leana Hosea reports from Sana'a.
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A Very Large Hole in the Sahara
Miranda Krestovnikoff discovers ways that scientists could use to halt sea level rise.
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The Air That I Breathe
How can you help your family breathe clean air? Tom Heap investigates.
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Bug Mac and Flies
Tom Heap adds locusts to his grocery shopping list and asks if we should all eat bugs.
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Cave Carnage
Europe's strangest species are under threat of extinction. Tom Heap investigates.
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Nature's Medicine Cabinet
Can plants and animals inspire a new generation of medicine? Alice Roberts reports.
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California Gasping
Is California's desperate search for water at an end? Tom Heap reports.
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The Real Avatar
Tim Hirsch travels to the Amazon to see the 'real Avatar' and the dam which threatens them
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Greening the Teens
Costing the Earth finds out if teenagers can really learn to turn the lights out.