adventure bob
Platinum Member
Liquid energy transport will continue to be the king cause its the most economic over all. Until there's something cheaper that also covers the switching cost, we'll stay on liquids. Sadly enough it usually takes a significant event to switch. Cars, refrigeration, airplanes, typewriters, printed books, buggy whips, read the machine the changed the world. These things have a cycle. While combustion engines have a pollution issue and will never be really efficient compared to other forms of propelling a vehicle, they are currently the best answer anyone has come up with. I think the revolutionary event that kills the car isn't a fuel or energy solution or even a better car; it will be something very different that no one was expecting.