Source: The Economist 2022/08/20 https://www.economist.com/science-and-technology/2022/08/17/ways-to-make-aviation-fuel-green Extrait Travelling by air is by no means the biggest source of anthropogenic greenhouse-gases. At the moment, it contributes about 2.5% of them. But, after a covid-induced dip, air travel is once again growing (see chart), and its emissions are high-profile and hard to…