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Airlines seem to be more in favor of investing in biofuels for jets than to have them use some other energy source. A review: https://www.frontiersin.org/artic

• jabl 3y ago
  To be honest, liquid hydrocarbons are a very good energy source when weight and volume is important, like aircraft. Battery-electric planes will likely become a thing for short range flights, but I'm having a hard time seeing how anything like the current level of long range flights would be compatible with a "zero carbon" society. Biofuels and synthetic fuels will allow a limited amount of long range flights though, so I don't think we'd need to give up on those entirely.