air pollution
Sadiq Khan: 'Londoners need to know when the city is suffering from high pollution levels'.
Premature deaths approaching half a million.
It can filter 95% of ultra fine particles.
We think we'll work from home tomorrow...
Scientists have created a shortlist of environmental factors linked to the disease.
Poor air quality has been linked to more than 6 million deaths each year.
It can also increase the risk of respiratory and heart diseases.
But is it all good news?
Highest levels in 4 million years
"Boris Johnson failed utterly."