India, Pakistan & Bangladesh in same smog bloc, only 7 countries meet WHO air quality standards

India, fifth in the smog rankings behind Chad, Bangladesh, Pakistan and the Democratic Republic of Congo, saw average PM2.5 fall 7% on the year to 50.6 mg/cu m

India, Pakistan & Bangladesh in same smog bloc, only 7 countries meet WHO air quality standards
India, fifth in the smog rankings behind Chad, Bangladesh, Pakistan and the Democratic Republic of Congo, saw average PM2.5 fall 7% on the year to 50.6 mg/cu m