Urban Britain is paving over its front gardens. Jheni Osman discovers the impact.
Professor Alice Roberts asks how ocean acidification will alter sea life.
Can Britain save the oceans by protecting its overseas territories? Tom Heap reports.
How noisy is the underwater environment? Tom Heap dips beneath the surface to find out.
Tom Heap visits the Scottish island that can power itself.
Peter Gibbs finds out if the ozone layer hole is healing 30 years on from its discovery.
How will the next government tackle Britain's environmental problems? Tom Heap reports.
China needs more water urgently. Isabel Hilton examines the nation's options.
Tom Heap investigates whether eco-cities are living up to their promise.
Tom Heap saddles up to find out if Britain is really about to become a nation of cyclists.