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