Throughout the COVID-19 lockdown — though air pollution in Delhi was less compared to 2019 — the air quality of the city was still worst among six large cities in different parameters, according to an analysis by the Centre for Science and Environment (CSE)
Among the six “mega cities” — Delhi, Mumbai, Kolkata, Hyderabad, Chennai, Bangalore — other cities had better air quality than Delhi, in terms of PM2.5 levels, as per the analysis.
Also, among the cleanest days of these cities in the same period, Delhi had the highest value of PM2.5 and Kolkata had the lowest.
“Among mega cities, Delhi is the worst performer. But if you include tier-1 cities also, then Lucknow and Patna are worse than Delhi,” said Avikal Somvanshi, a programme manager at CSE, who co-authored the analysis with Anumita Roychowdhury, executive director of CSE.
- A higher value of PM2.5 means more pollution.
- PM2.5 is fine inhalable particles, which can get deep into the lungs and even into the bloodstream and cause respiratory diseases.