https://www.bbc.co.uk/news/articles/cgq9nnj274xo.amp
Pollution in London has reduced after the controversial expansion of the Ultra Low Emission Zone (Ulez), according to City Hall.
Levels of nitrogen dioxide (NO2) - a toxic gas that exacerbates asthma, impedes lung development, and raises the risk of lung cancer - across all of London is estimated to have decreased by 27%, the report found.
Pollution in London has reduced after the controversial expansion of the Ultra Low Emission Zone (Ulez), according to City Hall.
Levels of nitrogen dioxide (NO2) - a toxic gas that exacerbates asthma, impedes lung development, and raises the risk of lung cancer - across all of London is estimated to have decreased by 27%, the report found.

