There can be little doubt that travelling the world has lost some of its allure now so much more is understood about climate change. Air travel is, without a doubt, a big polluter even though it is possible to fly and offset the carbon involved. These days, ethical travellers are more likely to seek more environmentally forms of crisscrossing the planet, such as rail travel, for example. Cycling is also becoming increasingly popular among Europeans as a means of exploring the continent.