内容摘要：“I think at a minimum, some explanation is warranted. We can’t just leave it at explanations about factionalism,” Rauf said.

“I think at a minimum, some explanation is warranted. We can’t just leave it at explanations about factionalism,” Rauf said.

Swiss aviation pioneer Bertrand Piccard speaks about Climate Impulse, a plane powered by liquid hydrogen, at the press presentation of the project in a hangar in Les Sables d’Olonne, France on Thursday, Feb. 13, 2025.(AP Photo/ Yohan Bonnet)Swiss aviation pioneer Bertrand Piccard speaks about Climate Impulse, a plane powered by liquid hydrogen, at the press presentation of the project in a hangar in Les Sables d’Olonne, France on Thursday, Feb. 13, 2025.(AP Photo/ Yohan Bonnet)

Liquid hydrogen, until now, has perhaps most prominently been known as a propellant to blast rockets into space.Aviation’s share of carbon emissions is relatively small, but growing faster than in any other industry because development of electric-powered planes trails far behind electric cars and trucks on the ground.Batteries are heavy in EVs on roads today, and keeping down battery weight in planes will be crucial for electric-powered flight.

“We have not had a ‘Tesla moment’ in aviation yet,” said Nikhil Sachdeva, an expert in how the aviation sector can transition to more climate-friendly technologies at consulting firm Roland Berger. “Hydrogen has the potential to be that for aviation, which is why it’s worth doing this right.”Using super-cold liquid hydrogen is “extraordinarily difficult, and we can barely do it for a few minutes right now. And here we’re talking about doing it safely for hours,” Sachdeva said.

But Solar Impulse faced pessimism too, he added, and Piccard’s team has “proven it can do what people would consider impossible.”

Keaten reported from Lausanne, Switzerland.A man walks by abandoned houses in Chanaute Market, Melamchi, northeast of Kathmandu, Nepal, Sunday, Sept. 15, 2024, damaged by floods in 2021. (AP Photo/Niranjan Shrestha)

A man walks by abandoned houses in Chanaute Market, Melamchi, northeast of Kathmandu, Nepal, Sunday, Sept. 15, 2024, damaged by floods in 2021. (AP Photo/Niranjan Shrestha)The sand-filled entrance of a house is visible in Chanaute Market, Melamchi, northeast of Kathmandu, Nepal, Sunday, Sept. 15, 2024, that was damaged by floods in 2021. (AP Photo/Niranjan Shrestha)

The sand-filled entrance of a house is visible in Chanaute Market, Melamchi, northeast of Kathmandu, Nepal, Sunday, Sept. 15, 2024, that was damaged by floods in 2021. (AP Photo/Niranjan Shrestha)Abandoned houses are visible in Chanaute Market, northeast of Kathmandu, Nepal, Sunday, Sept. 15, 2024. (AP Photo/Niranjan Shrestha)