The Mayor of London has welcomed a High Court ruling that the government has broken the law by failing to tackle nitrogen dioxide air pollution levels.

Sadiq Khan described the outcome of the case, brought by environmental legal group ClientEarth, as a “wake-up call” for action to be taken to improve air quality.

It is estimated that the health impacts of air pollution in London is equivalent to around 9,400 deaths per year.

Find out more about the issue of air quality and why it is so important for London by watching our new video below.

For further information on the High Court’s ruling, visit GOV.UK.