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Air pollution: how big a problem is it for cyclists?

Dr Gary Fuller, Environmental Research Group, comments on the dangers caused by diesel engines in urban areas. He said: 'People should be worrying about diesel traffic and particle exposure, and also about nitrogen dioxide. The thing about these is they haven’t really improved in urban areas for the last decade or so. We’ve managed to clean up air pollution emissions in terms of nitrogen dioxide from petrol cars.' 

The full story is available on The Guardian website