One reason that aircraft carriers are nuclear powered. We need to get rid of the internal combustion engine. You have to drill the oil out of the ground. Run pipes to get it to a port. Carry it in rusty old ships. Process it in billowing smokey smelly refineries. Truck it to gas stations where idiots spill it all over the car and ground. Then you pay good money to burn it and its gone forever. But hell, it puts food on my table. :-)