2021 lockdowns not as effective as last year's in cleaning Delhi-NCR air: CSE
The CSE analysis also showed that there were 27 very poor days in terms of air quality this February-March compared to 17 in 2020 and 12 in 2019.
Centre For Science Image Source Centre For Science And Environment 021 Lockdown Ockdown Effective 2020 Lockdown
Source: indiatvnews.com