Analysis of Air Pollution Migration during COVID-19 Lockdown in Krakow, Poland by Mateusz Zaręba, Tomasz Danek

“…However, when the temperature drops in late autumn, winter, and early spring, the problem of smog still occurs in the city. In a 24-hours averaging period, the concentration of PM10 has exceeded EU norms in 10 days in pandemic March 2021. …”
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