With many economies locked down to slow the spread of coronavirus, people from Beijing to Los Angeles have noticed bluer skies and less smog. Photos from Punjab and Nairobi reveal mountains that had been shrouded in haze for years. Satellites show cleaner air extending across broad swaths of Asia, Europe and North America.
Click here for original story, COVID-19 shutdowns are clearing the air, but pollution will return as economies reopen
Source: Phys.org