Table 1.

NO₂ emissions data acquisition across different regions.

Location	Agency	Satellite	Time	% Reduction	Source
Wuhan	NASA and ESA	Aura and Sentinel-5P	Jan–Feb (2019 and 2020)	30%	(NASA, 2020)
China	ESA	Sentinel-5P	Jan and Feb 2020	20–30%	(ESA, 2020)
Europe	ESA	Sentinel-5P	Mar 2019 and Mar 2020	20–30%	(ESA, 2020)
Italy	ESA	Sentinel-5P	Mar 2019 and Mar 2020	20–30%	(ESA, 2020)
France	ESA	Sentinel-5P	Mar 2019 and Mar 2020	20–30%	(ESA, 2020)
Spain	ESA	Sentinel-5P	Mar 2019 and Mar 2020	20–30%	(ESA, 2020)
USA	NASA	Aura	Mar 2015–19 and Mar 2020	30%	(NASA, 2020)