Business Standard

Air quality standards: Delhi still most-polluted capital in world in 2021

In 2021, none of the cities in India met the prescribed World Health Organization air quality standards of 5 micrograms per cubic meter (µg/m3), stated the World Air Quality Report 2021

Delhi Pollution
Premium

Delhi was found to be the most polluted capital in the world for the fourth consecutive year in 2021, according to a new report.

Swapnil Joglekar
Delhi was found to be the most polluted capital in the world for the fourth consecutive year in 2021, according to a new report.

In 2021, none of the cities in India met the prescribed World Health Organization air quality standards of 5 micrograms per cubic meter (µg/m3), stated the World Air Quality Report 2021, prepared by Swiss firm IQAir and released globally on Tuesday.

The report, presenting an overview of the state of global air quality in 2021, is based on PM2.5 air quality data from 6,475 cities across 117 countries.

What you get on BS Premium?

  • Unlock 30+ premium stories daily hand-picked by our editors, across devices on browser and app.
  • Pick your 5 favourite companies, get a daily email with all news updates on them.
  • Full access to our intuitive epaper - clip, save, share articles from any device; newspaper archives from 2006.
  • Preferential invites to Business Standard events.
  • Curated newsletters on markets, personal finance, policy & politics, start-ups, technology, and more.
VIEW ALL FAQs

Need More Information - write to us at assist@bsmail.in