Odd-even may not cut Delhi air pollution. An expert from IIT explains why

Air pollution is not only a winter problem. 'Year-round, the level (of air pollution) remains three times higher than the national standard'

Delhi declared a health emergency on November 2, 2019, due to severe air pollution.

On November 3, levels of PM 2.5--polluting particles 30 times finer than one human hair, that can enter the bloodstream and sicken or kill people--in Delhi’s air were recorded at a 24-hour average of 625 microgram per cubic metre (µg/m3) of air, the season’s worst. This is 24 times higher than the World Health Organization (WHO)-prescribed safe levels of 25 µg/m3 (24-hour average) and nine times higher than the laxer Indian standard of 60 µg/m3 (24-hour average).

The