'Late last year, in the dying days of the American presidential campaign, the World Wildlife Fund published its most recent Living Planet Report. Published biennially, these reports have long made sobering reading, but 2016’s took that to a new level, declaring that between 1970 and 2012 close to 60 per cent of the world’s wildlife had disappeared, and that without concerted action that figure was projected to reach 67 per cent by 2020. In other words, humans were close to having wiped out more than two thirds of the world’s wildlife in just half a century.'