Letters From Our Readers, April 5, 2021

General Electric airplane engine
Credit: General Electric
SHORT-RANGE FLYING MUST GO Your extensive piece on sustainable aviation fuels, “Moving the Needle” (March 8-21, p. 14) , explores many of the issues. But since bio-mass-derived sources are the only reasonable route at present, I don’t think you put enough emphasis on the major flaw: There simply...

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