Pollution, traffic biggest deterrent for people to walk: survey [http://cmsenvis.cmsindia.org/resources/newspaper/details.asp?id=89401]Most respondents said they started walking because of illnessExposure to pollution and traffic is the biggest deterrent for people keen on walking, found a multi-city study which was carried out to understand the trigger, barriers of walking, as well as the disease profile and perception of health in cities -- Delhi, Mumbai, Bangalore and Jaipur.