The global pandemic is believed to have an impact on emissions of air pollutants such as nitrogen dioxide (NO₂) and formaldehyde (HCHO). This study quantifies the changes in the amount of NO_x and VOC emissions via state-of-the-art inverse modeling technique using satellite observations during the lockdown 2020 with respect to a baseline over Europe, which in turn, it permits unraveling atmospheric processes being responsible for ozone formation in a less cloudy month.