The environmental impact of a shift to rail from short-haul flights

In the context of mitigating climate change, a shift from air to rail is proposed for short-haul journeys. The impact of this policy on the GHG emissions of aviation is small and will be even marginal if only journeys < 500 km are involved. These journeys account for 2.2% of the mileage of air travel, and the impact on emissions will be even...