One of the economic challenges facing developing countries is the cost of tackling air
pollution and improving its quality. In this study, we propose a comparative analysis of the
tropospheric nitrogen dioxide (NO2) column spatial configuration over Tehran between
pandemic conditions and normal conditions, based on the European Space Agency (ESA)
Copernicus Sentinel-5P products. Comparison of the time series of nitrogen dioxide
obtained from Sentinel-5P data showed that NO2 levels in 2020 were between 4× 10− 5 and …

Nitrogen dioxide (NO2) is one of the main air quality pollutants of concern in many urban
and industrial areas worldwide, and particularly in the European region, where in 2017
almost 20 countries exceeded the NO2 annual limit values imposed by the European
Commission Directive 2008/50/EC (EEA, 2019). NO2 pollution monitoring and regulation is
a necessary task to help decision makers to search for a sustainable solution for
environmental quality and population health status improvement. In this study, we propose a …