Readings from ESA's Sentinel-5P satellite show that over the past six weeks, levels of nitrogen dioxide (NO2) over cities and industrial clusters in Asia and Europe were markedly lower than in the same period previous year. The average concentration during the week of 16-22 March was 21 percent lower than for the same week in 2019.
"Addressing long-term air quality problems requires ambitious policies and forward-looking investments", he said.
In the week of March 16-22, average NO2 levels in Barcelona were down 55 per cent compared with the same week in 2019.
The reductions, in particular of nitrogen dioxide (NO2), are due to reductions in traffic and other activities, especially in cities with containment measures, says the EEA in a statement released today.
In Lisbon, according to data, average levels of NO2 fell by 40% from one week to the next. Compared to the same period past year the reduction was 51%.
In Edinburgh's Nicolson Street the average Nitrogen Dioxide for 19th to 26th March 2019 was 58.8 micrograms per cubic meter compared to 28.3 for 17th to 24th March 2020.
In Madrid, average NO2 levels went down by 56 % from one week to the next. Compared with the same week in 2019, the reduction was 51 percent.
However at present it is not clear whether ongoing exposure to air pollution might worsen the condition of those infected by the virus.
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