BRUSSELS — The best way to cut greenhouse gas emissions from flying is to fly less — but that’s a nonstarter for the industry and millions of passengers.
Instead, the sector is hunting for a tech fix that would allow airplanes to keep flying while polluting less — and one idea is to use hydrogen. But there are big questions over whether this is a workable solution.
Here are five challenges facing hydrogen-powered aviation.
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Hydrogen can be very clean or very dirty — it all depends on how it’s produced.
