CURRENT AFFAIRS

Detailed explanation-1: -New Delhi continues to be the world’s most polluted capital city for the fourth consecutive year. As per the report, in 2021, India was home to 11 of the 15 most polluted cities in Central and also in South Asia.

Detailed explanation-2: -New Delhi once again kept its place as the most polluted capital city in the world in 2021, with an average PM2. 5 concentration of 85 micrograms per cubic meter of air (g/m³). PM2.

Detailed explanation-3: -Most Polluted Capital City In World: As the air quality in Delhi is oscillating between ‘very poor’ and ‘severe’, the national capital has been adjudged the most polluted capital city in the world.

Detailed explanation-4: -New Delhi: The 2021 World Air Quality Report for the fourth consecutive year finds New Delhi as the most polluted capital city (and fourth most polluted city) in the World followed by Dhaka in Bangladesh, N’Djamena in Chad, Dushanbe in Tajikistan and Muscat in Oman.

Detailed explanation-5: -IQAir’s 2021 World Air Quality Report is the first major global air quality report based on updated annual WHO air quality guideline for PM2. 5. The new guideline was released in September 2021 and cut the existing annual PM2. 5 guideline value from 10 µg/m3 to 5 µg/m3.