air quality guideline]
Agence France-Presse | By Agence France-Presse
UPDATED ON NOV 01, 2018 12:41 PM IST
Hindustan Times, Delhi | By Anonna Dutt, New Delhi
UPDATED ON AUG 28, 2018 11:22 AM IST
The world’s top 20 most polluted cities, according to the World Health Organization’s (WHO) database, are in developing countries. Almost all the cities in low- and middle-income countries with more than 1,00,000 residents fail to meet WHO air quality guidelines.
Houstan | By Press Trust of India
UPDATED ON AUG 23, 2018 12:35 PM IST
Researchers said that if PM2.5 concentrations worldwide were limited to the World Health Organization’s (WHO) air quality guidelines, the global life expectancy would be on average 0.59 year longer.