Rockets (especially SpaceX ones) can fly without fossil fuels. Hydrocarbons can easily be synthesized with thermal depolymerization or wasteful processes like

Rockets (especially SpaceX ones) can fly without fossil fuels. Hydrocarbons can easily be synthesized with thermal depolymerization or wasteful processes like how we make ethanol from corn. That's to say nothing of how all the oil fields we've tapped are the easy to get ones, and the deep sea holds a ton of oil.