I think hydrocarbons will always find certain use cases like planes where the fuel density is such a huge advantage. To be carbon neutral they will need to be s

I think hydrocarbons will always find certain use cases like planes where the fuel density is such a huge advantage. To be carbon neutral they will need to be synthesised from green hydrogen or methane (ie from renewable sources). I can’t see biofuels being useful unless using non-edible feedstocks. Otherwise you risk increasing food scarcity for marginal benefit.