Let's come up with a car that avoids resource depletion and ensuing economic collapse!
Fossil fuels are gonna run out, so is lithium, so traditional and electric cars are not viable. Neither are wind, solar, or nuclear. I think the solution is synthetic fuel, so /sci/, I pose you this question:
What fuel that could be used in an internal combustion engine would provide the highest efficiency of energy from the power plant used to synthesize the fuel to mileage on the road?