However, underground Metro rail protects from the high level of pollution, says data prepared by the Centre for Science and Environment (CSE).
Shunned as one of the world's most polluted cities, Delhi is literally gasping for breath, with air pollution levels seeming to be skyrocketing without any restraint, it says.
According to it, exposure in all transport modes in Delhi is very high with the average levels recording at 2 to 4 times higher than the background levels reported by the state pollution control board.
"Open modes like autorickshaws, walking and cycling have the highest exposure. During off-peak hours, all modes show lower levels: Difference between peak and off-peak was as follows -- autos 1.3 times higher; walking 1.5 times higher, and buses 2.5 times higher," the CSE says.
Pollution levels peak near junctions and in traffic jams: "In a traffic jam on a stretch close to Paharganj, levels peaked at 1,170 microgramme per cu m. At a traffic jam near Govindpuri Metro Station, the peak level was 725 microgramme per cu m," the data says.
Even cars do not help. It says monitoring inside the car was carried out during off-peak hours and the average levels were found to be double the ambient levels.


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