For Coronavirus lockdown around the world ,Air pollution has decreased Worldwide . The pandemic is shutting down industrial & Human activity . Nearly 3.5 billion people around the world are living in voluntary or mandatory confinement . According to the World Health Organization NO2 as “a toxic gas which causes significant inflammation of the airways . According to Nasa, nitrogen dioxide levels across eastern and central China have been 30% lower than normal. on 9 March, NO2 levels in Milan and other parts of northern Italy have fallen by about 40% . Of the 30 most polluted cities in the world, 22 of them are in India now the air quality is far better than before . In Delhi, particulate matter (PM2.5) dropped from 165µg/m3 on March 21, to 64µg/m3 . https://www.reuters.com/article/us-health-coronavirus-air-pollution/coronavirus-lockdowns-give-europes-cities-cleaner-air-idUSKBN21G0XA?feedType=RSS&feedName=worldNews
