In Italy, currently the country hardest hit by the Covid-19 pandemic, average concentrations for nitrogen dioxide (NO2) in Milan were recorded at least 24% lower over the last four week than the previous period. In Bergamo, NO2 has been in constant decline over the last four weeks, with average concentrations during 16-22 March 47% lower than the same week in 2019. And in Rome, NO2 was down 26-35% compared with the same period last year.
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