Bill Gates (centre) boards a helicopter to the World Economic Forum on the tarmac of Zurich Airport, in Ruemlang, Switzerland.PHOTO: EPA-EFE  “I think it is insane that people are gathered here to talk about the climate and they arrive here in private jet,” 16-year-old Swedish campaigner Greta Thunberg told AFP, after spending 32 hours on trains … Continue reading The environmental impact of air travel