Hello! Though I'm "American" I think the most efficient solutions are going to come from abroad. The Europeans have used up a lot of their raw natural resources, so they have to look to smarter solutions. We in America are lazy. We've got this big bank of resources under us, and we trick ourselves into thinking it'll last forever. Europe may be it. China may be it. We'll see.
RE: DRONE TAXI: chineses realizam o primeiro voo com passageiro