Robots are disinfecting hospital rooms, delivering key supplies and helping maintain lockdown orders. 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.
These stunning images reflect how the air is changing as the world confronts COVID-19. People are staying home, driving less and taking fewer flights and cruises.
This crisis provides a unique experiment to see how the atmosphere responds as nations cut their emissions. The air is getting cleaner, although these blue