Aircraft Fuels Are Clean and Sustainable Aviation Fuels Are Clean

"I would like to invite everybody in this world to do these basic calculations, because people say hydrogen is clean and sustainable aviation fuels are clean," he says. "Because the creation of these or the distribution of the energy using these methods is extremely inefficient,. And on top of that, we have to stack that to fly a plane." 'We need about four or five times the clean energy we have today'