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.
Could the revival of the pine marten be bad news for grey squirrels and good for the reds?
With Antarctic sea ice growing, Tom Heap asks what is happening to the climate.
Tom Heap asks what the falling price of oil means for the environment.
Tom Heap meets the scientists trying to lessen the impact of volcanic eruptions.
Tom Heap asks if the green belt surrounding UK cities is really green or pleasant.
Tom Heap goes in search of the hybrid beefalo, which is damaging the Grand Canyon.
Bristol is Europe's Green Capital for 2015. Tom Heap finds out what that means.
Iceland is warming faster than most countries. Tom Heap finds out why.