ABSTRACT
Travelling by air, in contrast to the train, is an almost unmitigated disaster for the environment. Although an efficient aircraft, travelling fully loaded, can cover miles with less fuel per person than the average car, aircraft travel covers vastly greater distances than cars. The average car goes 9000 miles (14,500km) a year, with an average of about 1.5 people in it at any time. One return flight to the US will probably exceed the per-person emissions of a year's car use.
