Long before Covid-19 brought global travel to a screeching halt, the problems associated with large numbers of people moving around the planet were becoming obvious.

Published last month, Sustainable Travel: The Essential Guide to Positive-Impact Adventures (White Lion Publishing), by Holly Tuppen, is a guide written for travellers wishing to minimise the harm they do as they negotiate the world’s ethical and climate-related challenges. Below are a few of the concerns that are addressed within its pages.