Air pollution levels in London drop by 36%published at 17:06 British Summer Time 23 April 2020
Thomas Mackintosh
BBC London News
Air pollution levels have dropped by more than 35% in the capital as transport use has plummeted in the lockdown, data shows.
Preliminary analysis by experts at the University of York reveals levels of key pollutant nitrogen dioxide, which mostly comes from combustion engines in vehicles, have been significantly reduced in the past few weeks.
But there has not been the same impact on another form of toxic pollution, tiny particles known as PM2.5.
Experts say that is because the particles stay in the air longer, and are generated from more sources including agriculture and burning solid fuels which have continued during the lockdown.
But the fall in nitrogen dioxide gives a potential glimpse into the cities of the future where most transport will not be from diesel or petrol vehicles, which the government plans to phase out to tackle climate change and pollution.
According to the research, London has seen a drop of nitrogen dioxide levels by 36% compared with a five-year average for the same time of year in 2019.