“…A comprehensive 2016 study of what is to blame for Delhi’s poor air identified some obvious sources, such as car emissions, the city’s coal-fired power stations and rubbish fires both small and literally mountainous. But it also highlighted more unlikely culprits. 
Dust kicked up by cars along Delhi’s vast and growing road network contributes between a third and 56% of the most harmful pollutants in the city’s atmosphere.” The Guardian
Read it on Delhiair.org: Delhi’s deadly dust: how construction sites are choking the city
delhiair.org - be informed and active about air quality in New Delhi, India 