March 7 , 2019
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- IQAir AirVisual 2018 World Air Quality Report was compiled by Greenpeace in association with IQAir AirVisual.
- This indexs measures the presence of fine particulate matter PM2.5 in the air.
- According to the report,
- Delhi has been ranked the most polluted capital in the world.
- Gurugram is the most polluted city.
- 22 of the top 30 most polluted cities are in India.
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