evidence: Traveling by plane, train or automobile: the most environmentally sound choice may not always be clear. The latest annual addresses the issue assessing the value of travel by train and plane, amid efforts to put in place the European Union’s green deal. The European Green Deal includes the objective of reducing greenhouse gas emission from transport by 90% by 2050 compared with 1990. Shifting to more sustainable transport can make an important contribution to reaching this objective. For passenger transport, a shift from air to rail travel can play a key role, the report says.