Great change in the world\’s environment after the lockdown
Install Apps A study of 40 cities in 35 countries found that in most cities, invisible dust particles, PM 2.5 and PM 10, dropped sharply. Air quality around the world has improved significantly since the Kovid-19 epidemic hit major cities. Half of the world\’s people are forced to live indoors because of Kovid-19. Vehicles, factories […]
Great change in the world\’s environment after the lockdown Read More »








