Marylebone Road and Hyde Park Corner, both in central London, have the most polluted postcodes in Britain, says a new study on air quality.
The data comes from a project to map concentrations of nitrogen dioxide (NO2) across the country.
However, the results also show that large parts of Britain have relatively clean air.
Diesel vehicles are a key source of NO2 gas, which has been linked to respiratory disease.
Although dirty air doesn’t kill people directly, it’s estimated to contribute to shortening the lives of 40,000 people a year in the UK. Pollution is thought to undermine the health of people with heart or lung problems.
Original Article: http://www.bbc.co.uk/news/science-environment-42566393