Walking, Cycling outweigh health risk from pollution

                The benefits of walking and cycling outweigh the negative effects on health of air pollution, even in places with high levels of air pollution, according to a new study. This new evidence strengthens the case for supporting cycling even in polluted cities – an effort that in turn can help reduce vehicle emissions. “Our model indicates that in London health benefits of active travel always outweigh the risk from pollution,” said Marko Tainio from University of Cambridge in the UK. 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. Regular physical activity reduces the risk of diseases such as diabetes, heart disease, and several cancers.