European airline easyJet unveiled its plans for a zero emissions hydrogen fuel system on Tuesday, which it says could save about 50,000 tons of fuel per year.
The concept is based around the idea of stowing a hydrogen fuel cell in the hold of the aircraft.
The zero emissions system would capture energy when the aircraft brakes during landing, and would then charge lightweight batteries while the aircraft is on the ground.
The aircraft could then use this clean energy while taxiing, negating the need to use its conventional jet engines. The only waste product would be water, which could in turn be used in the aircraft's water system.
The idea is in part inspired by research being done by students at Cranfield University.
"The hybrid plane concept we are announcing today is both a vision of the future and a challenge to our partners and suppliers to continue to push the boundaries towards reducing our carbon emissions," Ian Davies, head of engineering at easyJet, said in a release.