Originally Posted by
Longtimer
"The real downside of biofuel for aircraft is the amount of arable land that would have to be taken away from growing food crops to provide the materials for biofuels.
Fuel consumption for international
aviation could be as high as 852 million tonnes (Mt) by 2050 (ICAO, 2016), and could
require 426 Mt of
bio-jet to meet the GHG emissions-reduction goals. Current
production, however, is currently very limited, at less than 0.1% of global total consumption of all types of jet fuels."
Foillowing is a goto to a paper on the subject:
https://www.irena.org/documentdownlo...ation_2017.pdf
Biofuel seems likely not to be a good idea. But the use of sustainable power and commonly available substances to manufacture hydrocarbons seems more open to technological development than electric power by batteries.