I am lucky that this is quite an easy one for me. In the 1970s, while train travel was still the default way of travelling in Europe, I read quite a bit about the environment and decided never again to fly. Because of the relative costs, I have probably had fewer holidays abroad than friends in a similar income bracket; maybe once every few years rather than a few times a year, and mainly to France. Once we travelled by train to Poland, once by train and ferry to Morocco and on another occasion to Istanbul. For the holiday of a lifetime, after my husband and I retired, we travelled by freighter and train to America, where we also covered thousands of miles by train. I emphasise that this is over the course of a lifetime. But we have no regrets and the most amazing memories.