I'll tell you about it sometime, if you like. They probably think they lead environmentally blameless, beatifically mine-free lives. But I suspect the man who went to Omaha for lunch and visited an oil platform not long ago knows better than they do. Speaking of steel cars, you called a cab to go to the airport. I've 'been to Miami,' if landing and taking off at MIA can be called that, but haven't needed to leave its confines on anything but a plane since about 1978.
Most roads are.
I know you are a man with sense enough to come in out of the rain. Into a concrete and steel building, with electric lights fed by copper wires, that is. And once there, you put yourself through the grand old air-traveler's ordeal of checking in. Maybe you had one of them newfangled e-lectronic tickets. They might have a bomb sniffer, developed by a company whose principal product was geophysical instruments for the mining industry.