Ways to cut air pollution around the world
How your next meal might affect your next breath
Air pollution so bad it's safer not to exercise, and the companies trying to clean it up.
Videos, features and solutions
Huan Ming built a vast 'solar valley' in China
The US Forest Service reveals how much trees actually help tackle air pollution
Architect Stefano Boeri plans to build two in China to fight pollution.
A special programme exploring how China is finding ways to cut air pollution.
With delivery vans causing congestion and pollution, a delivery robot could be the answer
One day we might have to pay to breathe clean air according to Prof Niall Mac Dowell.
Replacing smoky cook stoves with gas - to improve the health of women and babies.
More delivery vans means more air pollution in our cities. What are the alternatives?
Trees take in carbon dioxide but they also convert some of the toxic gases in our air.
How Mexico City introduced a bold scheme to tackle deadly pollution.