I have nothing against Tesla. I've ridden in one. It was awesome. And we are putting in a Tesla charging station at work. But the post I was responding to stated that 50% of a car's lifecycle energy consumption comes from building it. I was arguing in support of this. The steel, copper, nickel (Prius) / lithium (Tesla), aluminum, foam, control components, etc. have to be extracted, refined, fabricated, transported, and assembled. The plant's steel, concrete, copper, glass, etc. have to go through the same process. All this takes energy.
And that is why it is reasonable to believe that 50% of a car's lifecycle energy consumption comes from building it.