Aviation: a greener sky, but when?|National Geographic Geographic National Geographic

Will commercial flights one day ecological?When I talk about it with aeronautical experts, a fact and a figure always come to my mind.The fact: everything that can revolutionize transport on earth will not be used as soon as in the air.Solar panels, wind turbines, electric motors, high storage capacity batteries, hydrogen batteries, magnetic levitation...Let's be clear, all these technologies are useless at present to send a few hundred people to the stratosphere and convey them on thousands of kilometers.And the figure: more than 80 % of the world's population has never mounted on a plane.

Getting a look at this fact and this figure is the whole problem that the airlines and the aeronautical manufacturers are competing that seek to decarbonize thefts.Air transport may become green, but not immediately and not as much as transport by land.

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However, the speed at which this industrial sector will succeed in adapting could affect its image - and its profits.At a time when environmental defenders insist on the heavy responsibility of the plane in climate change, the time that air transport will be put in green may well bring travelers to wonder if it is morally acceptableto take the plane.

"Planes can no longer continue to fly with fossil kerosene.But there is no magic solution, "warns Jennifer Holmgren, Director General of Lanzatech.This company is a pioneer in the development of fuel for aviation created from unusual sources (such as waste) to replace kerosene.