Healthy Air, healthy Planet: International Day of Clean Air for Blue Skies
In 2019, the UN decided to declare September 7 the «International Day of Clean Air for Blue Skies». With the Corona-related lockdown, images went around the world showing blue skies where visibility is otherwise severely restricted by polluted air. We have also published a number of articles on this topic, whereby not only the concrete effects on cities were examined, but also the effects on health were questioned. Read more here.