Abstract
In 2020 the entire world was severely affected by COVID -19 epidemics. Because of preventing of the SARS Cov 2 virus spread there was necessary to introduce considerable restrictions of movement of citizens. This resulted in various negative effects in the field of economy. However, as road traffic is an important source of pollution – particularly of emissions of air pollutants and greenhouse gases it could be expected that these mobility restrictions result in certain positive effects on the environment. The paper will try to estimate the air quality during the period of epidemics when mobility was severely restricted (second half of March and April 2020, second half of October, November and December 2020). The review will be limited to those kinds of pollutants which are particularly related to road traffic (nitrogen oxides, particulate matter, ozone) as well as to carbon dioxide as the most important greenhouse gas.
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