The latest data compiled in the IQAir AirVisual 2018 World Air Quality Report and interactive world's most polluted cities ranking, prepared in collaboration with Greenpeace Southeast Asia, reveals the state of particulate matter (PM2.5) pollution last year. The ranking a study that relies on ground-based sensors located in 3,000 cities from 73 countries was compiled by IQAir Group, a manufacturer of air-monitoring sensors as well as purifiers and environmentalist group Greenpeace. Out of the 20 most polluted cities in the world, 18 are in India, Pakistan and Bangladesh, the report said. Out of 20 most polluted cities in the world there are total 15 Indian Cities with Gurgaon and Ghaziabad being the most polluted cities, followed by Faridabad, Bhiwadi and Noida being in the top six, with Delhi on the 11th spot, according to the World Air Quality Report. China's capital Beijing, once among the most polluted cities in the world ranked 122nd in the list of the most polluted cities last year based on PM2.5 data, but is still at least five times more polluted than the World Health Organization annual safety limits of 10 µg/m3. Jakarta and Hanoi emerged as Southeast Asia’s two most polluted cities and average concentrations in the cities in China fell by 12% from 2017 to 2018. Of the countries analysed, Iceland emerged as the one with the cleanest air.
Tags : #India#Environment#Pollution