TRAIN travel is not always the greenest alternative to flying.
To compare the emissions of 11 different types of transport in the US, Mikhail Chester and Arpad Horvath of the University of California, Berkeley, calculated how many passengers each train, plane, bus or car would carry in its lifetime, as well as how many kilometres it would cover. The pair also took into account emissions produced when creating the associated infrastructure, such as tracks, roads and airports, and how much they would be used.
Overall, cars were the worst climate offenders, beaten only by buses travelling in off-peak hours. But…
