Can air pollution negate the health benefits of cycling and walking?
Tainio M, de Nazelle AJ, Götschi T, Kahlmeier S, Rojas-Rueda D, Nieuwenhuijsen MJ, de Sá TH, Kelly P, Woodcock J
Preventive medicine. Oct 2015
(DOI : 10.1016/j.ypmed.2016.02.002)