Ricardo – Energy & Environment – 07 May 2020
The first blog on this topic considered some of the early evidence of changes in total nitrogen oxides (NOx) concentrations after the UK lockdown on 23rd March. Since that time, there has been a considerable amount of interest in how air quality has changed around the world. Like the last blog, the results shown here should be considered provisional, not least because the data have still to be fully quality assured. This blog extends our analysis to look at some of the changes we are seeing to nitrogen dioxide (NO2) and ozone (O3).