Airbus announced that they will be testing You can find more information atA modified A380 will be powered by a hydrogen engine. This is in the hope of making commercial aviation more efficient.

The European aircraft giant said Tuesday that it’s working with engine-maker CFM International — a joint venture of General Electric‘s aviation arm and France’s Safran — on the test plane, which will include a modified version of an engine already in use that will have to handle higher temperatures at which hydrogen burns. Airbus indicated that tests could start in 2026.

Airlines and manufacturers of aircraft are trying to cut carbon emissions. Airbus, which has been aggressively seeking hydrogen fuels, said it was working on an aircraft that uses the fuel and will go into service by 2035.

Rival BoeingIt has been focusing on more sustainable aviation fuelsThey currently account for less than 1 percent of jet fuel supply, and they are much more costly than regular jet fuel. Last June at an investor conference, Dave Calhoun, CEO of Hydrogen Corporation stated that it was unlikely that hydrogen-powered airplanes would be built on “the same scale as the planes we are referring to” prior 2050.

“It’ll work for small packages,” said he.

One big challenge in using hydrogen fuel is that storing it would require additional equipment that adds weight to the aircraft, reducing the number of people or amount of cargo that a plane could carry, said Richard Aboulafia, managing director at Aerodynamic Advisory, an aviation consulting firm.

He explained that hydrogen is created when economists and engineers don’t communicate with each other.

Airbus claimed that the A380 was the best-selling passenger aircraft in the world because of its ability to hold liquid hydrogen tanks, as well as other equipment.