Atmospheric pollution during the Covid-19 pandemics in Slovakia

The changes in the particle pollution in eight Slovak regions were evaluated by a paired t-test to verify the significance of the concn. changes during, before and after the lockdowns introduced in 2020 as compared with those of 2019. The obsd. air quality improvement was not flat-rate and rather momentary, and it did not last even through the whole restriction period. Significant decreases were recorded only for NO 2 concn. The European Commission limits of particulate pollution were exceeded in Slovakia. A concise literature rev. was also included.