2021
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Beijing
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Islamabad
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New Delhi
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Dhaka
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Detailed explanation-1: -Delhi topped a list of 92 capital cities in 2020, 85 such cities in 2019, and 62 such cities in 2018. In terms of annual average PM2. 5 levels in 2021, Delhi ranked as the most polluted out of 107 capital cities in the world, according to the 2021 World Air Quality Report.
Detailed explanation-2: -Delhi was ranked as the world’s most polluted capital city.
Detailed explanation-3: -Among the most polluted cities with respect to PM2. 5 levels, Delhi (99.71 micrograms per cubic metre) ranked first, Haryana’s Faridabad (95.64 micrograms per cubic metre) ranked second and Uttar Pradesh’s Ghaziabad (91.25 micrograms per cubic metre) third, according to the analysis of CPCB data.
Detailed explanation-4: -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-5: -New Delhi saw a 14.6% increase in PM2. 5 concentrations in 2021 with levels rising to 96.4 g/m3 from 84 g/m3 in 2020. India also continues to feature prominently among the most polluted cities – with 35 of the top 50 most polluted cities being in India.