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.
