‘Large decreases’ in air pollution during coronavirus lockdowns

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The highway along the airport is empty in Frankfurt, Germany, Sunday, March 22, 2020. Due to the coronavirus the aviation industry expects heavy losses. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (AP Photo/Michael Probst)