In respect to air pollution, London is one of the safer cities in the world in which to cycle and walk, with the researchers finding it safe to do so all day. “Our model indicates that in London health benefits of active travel always outweigh the risk from pollution,” said Dr Marko Tainio from the Cambridge MRC epidemiology unit, who led the study.
“Even in Delhi, one of the most polluted cities in the world – with pollution levels ten times those in London – people would need to cycle over five hours per week before the pollution risks outweigh the health benefits.
Read more @ the Guardian
Delhi Air Quality Information