>>1993401You can make bio diesel at home, just like you can run an old diesel engine on used vegetable oil that fries were cooked in. You can also make eithanol with a lidded bucket. Synthetic fuel uses any organic or carbon matter with C02 but it does take up an amount of energy to produce it.
So far, none of those are competitive with
gas/diesel fracking but the biggest bottleneck is probably the energy generation, which is why i mentioned nuclear since it inherently creates surplus energy during nighttime as it can't be easily powered down. If nuclear power becomes more widespread, this not only reduces the burden on other fuel sources by itself but also creates a consistent surplus of energy at a certain time of the day that can be used for other applications, including fuel production.
Ethanol is commonly used as fuel in the world in various amounts and is often added to gas, including in the US, although it's more of a welfare scheme than an actually useful process because growing corn for ethanol using current methods takes up about as much energy(primarily in fuel) as it produces, so the amount of useful work is small. I don't know how this economics work out in poorer countries but a few in Latin America, Africa and Asia use upwards of 60% ethanol content fuel commonly.
Synthetic fuel takes up power to make to heat up and build pressure to create it but the amount varies depending on the matter used. Coal and natural gas are the most efficient so they're the most commonly produced ones but plant matter is also used, although the water vapor limits the efficiency of the process.
As for hydrogen i don't know.
