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Health Impacts of NO2

Questions to the Mayor of London – answered on 17th October 2019.

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Photo of Keith Prince Keith Prince Conservative

What is your specific evidence for the health impacts of current levels of NO2 in London?

Photo of Sadiq Khan Sadiq Khan Mayor of London

There is a broad scientific consensus that air pollution, including NO2, has direct effects on public health. This is why the EU and the UK Government have adopted legal limits on concentrations of NO2 for the protection of public health, which are themselves based on recommendations and guidelines from the World Health Organization.

In 2015 the UK Government’s Committee on the Medical Effects of Air Pollution (COMEAP) undertook a meta-analysis of the epidemiological evidence. This report was followed later in 2015 and in 2018 by COMEAP reports that quantified the “mortality burden” of elevated short and long term exposure to NO2, based on analysis of multiple cohort studies, and these studies have informed independent calculations of the scale of health effects in London.