Climate forcing from the transport sectors

The authors provide a comprehensive analysis of radiative forcing from the road transport, shipping, aviation, and rail subsectors, using both past- and forward-looking perspectives. Since preindustrial times, transport has contributed {approx}15% and 31% of the total man-made CO2 and O3 forcing, respectively. Proceedings of the National Academy of Sciences, Vol.105,no.2 (2008)