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ParisTech Review. Air traffic is expected to rise globally, particularly in Asia, but if it is to comply with the environmental objectives set out by the international community, the energy consumption of aircrafts has to be reduced. Are we on track? Didier-François Godart. The whole aviation industry is focused on this ambition. Engine improvements, the electrification of planes and new solutions such as “green taxiing” (rolling on the tarmac with engines offline) will allow airline companies to save both CO2 and money. One should not underestimate the operational benefits: punctuality will increase and congestion at gates and parking areas will be reduced. As an indication, a major airline that adopts “green taxiing” on all its planes will save enough to buy a new plane each year. It is anything but a marginal factor. The “electric plane” is all the rage in aeronautics. But what will truly be electric in it? The only primary energy source on board of a commercial plane, in ...