How commuters are exposed to pollution

The study revealed that people who travelled in the open air - those who took autorickshaws and pedestrians - were the most exposed to pollution.

Commuters in the national capital who walk to their destinations or those who take autorickshaws are exposed to more than thrice the pollution that people who take the Delhi Metro, according to the findings of a study conducted by researchers from three British universities and three Indian institutes.

A woman out on a foggy winter morning at Kirti Nagar in New Delhi on January 12. (Sanchit Khanna / HT Photo)