> producing 1kWh worth of petrol doesn't require 1kWh of energy
… so long as you don’t count the 1kWh of photosynthesis that was done by a bunch of ancient plankton to rip CO2 molecules apart and build hydrocarbons instead.
I meant the energy that was originally used to create oil in the first place. You don't need to add any more, because oil, unlike hydrogen, already exists.
… so long as you don’t count the 1kWh of photosynthesis that was done by a bunch of ancient plankton to rip CO2 molecules apart and build hydrocarbons instead.