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Scuba Squad: Cleaning the Ocean

Cleaning the seabed, one dive at a time. Miranda Krestovnikoff joins a new clean-up squad.

• 30 mins

Making a Splash

Tom Heap meets a man who can turn dirty water into clean, drinkable water.

• 30 mins

Where Have All the Flowers Gone?

Tom Heap investigates the theft and smuggling of rare flowers and its impact.

• 30 mins

Arctic Future

The melting sea ice of the Arctic creates opportunities and threats. Tom Heap reports.

• 30 mins

Taming Australia

Australia has big plans to develop the Northern Territory. Julian Rush reports.

• 30 mins

The Ice in Iceland

Iceland is warming faster than most countries. Tom Heap finds out why.

• 30 mins

Bristol: Green Capital?

Bristol is Europe's Green Capital for 2015. Tom Heap finds out what that means.

• 30 mins

Hunting the Beefalo

Tom Heap goes in search of the hybrid beefalo, which is damaging the Grand Canyon.

• 30 mins

Greening the Green Belt

Tom Heap asks if the green belt surrounding UK cities is really green or pleasant.

• 30 mins

Lava: A Dangerous Game

Tom Heap meets the scientists trying to lessen the impact of volcanic eruptions.

• 30 mins

The Price of Cheap Oil

Tom Heap asks what the falling price of oil means for the environment.

• 30 mins

Climate Change: Inconvenient Facts?

With Antarctic sea ice growing, Tom Heap asks what is happening to the climate.

• 30 mins

Reds Return

Could the revival of the pine marten be bad news for grey squirrels and good for the reds?

• 30 mins

Cycle City

Tom Heap saddles up to find out if Britain is really about to become a nation of cyclists.

• 30 mins

Eco-Cities

Tom Heap investigates whether eco-cities are living up to their promise.

• 30 mins

China's Water Revolution

China needs more water urgently. Isabel Hilton examines the nation's options.

• 30 mins

Britain's Environment: The Debate

How will the next government tackle Britain's environmental problems? Tom Heap reports.

• 30 mins

The Ozone Hole Thirty Years On

Peter Gibbs finds out if the ozone layer hole is healing 30 years on from its discovery.

• 30 mins

Electric Island

Tom Heap visits the Scottish island that can power itself.

• 30 mins

Sounds of the Seas

How noisy is the underwater environment? Tom Heap dips beneath the surface to find out.

• 30 mins

Britain Rules the Waves

Can Britain save the oceans by protecting its overseas territories? Tom Heap reports.

• 28 mins

Oceans of Acid

Professor Alice Roberts asks how ocean acidification will alter sea life.

• 30 mins

Where Have All Our Gardens Gone?

Urban Britain is paving over its front gardens. Jheni Osman discovers the impact.

• 30 mins

Lungs, Lies and Automobiles

Have we been lied to about air pollution? Tom Heap investigates.

• 30 mins

Paying For Our Parks

The National Parks are exploring new commercial opportunities. How far should they go?

• 30 mins

Coast: 50 Years of Change

A new report reveals how the UK's coast has changed over the last 50 years.

• 30 mins

Antipasto Agony

Bad news for lovers of tapenade and pesto - olive trees are succumbing to a new disease.

• 30 mins

River Quality

Tom Heap investigates claims England's rivers are under threat from 'insidious' pollution.

• 30 mins

Murder in Cambodia

Peter Hadfield investigates the illegal trade in Siamese rosewood.

• 30 mins

In Conversation with David Attenborough

David Attenborough and fellow experts join Tom Heap to preview the Paris Climate Summit.

• 30 mins