The small capital is suffering from some of the worst pollution in the world.
Would you eat insects to save the planet? Adele Roberts takes on a bug eating challenge
BBC Radio 1
David Shukman examines the effect that air pollution has on our bodies.
4/4 Cameras in space show Earth changing rapidly. These images can inspire us to help.
6/6 Whales and sea lions alike journey to the seas off Alaska to feed on the plankton bloom.
2/2 The salmon run arrives in Alaska, and Parsnip and Pushki return to the bay to feed.
One-off special looking at seven diverse natural wonders of the Commonwealth.
An international team of scientists is trying to change perceptions of sharks.
7/7 David Attenborough investigates the effects of rising temperatures in the polar regions.
6/6 Cities can be worlds of surprising opportunity for animals.