Many years ago, before the US had what is it, 200,000,000 cars and before China and India had very many, I read somewhere that there wasn’t enough copper in the world to build that many electric cars. Is that correct? Is it at all feasible to build motors without copper? Could you use alumin(i)um windings? Is there any economic way to build electric motors without windings?
Sure no reason you can’t wind a motor with aluminum wire; in fact it’s done frequently. However, as long as copper is available, there are reasons you might not want to.
We certainly have the potential of running into copper shortages (before the economy went in the tank, copper prices, along with all metals, were through the roof), but don’t forget that there’s probably tons of the stuff buried in landfills that no doubt will be dug up as prices spike in the future.
IIRC, its possible to use something like a carbon nanotube in place of wires (of course, we’ve got to be able to mass produce them in the right sizes and shapes, which we’re not quite there, yet).
I don’t think that you’ll see serious cries of us “running out” of copper for at least 50 or so years.
While it’s correct that nanotubes are highly conductive, it’s rather an understatement to say that we’re not quite there yet. 50 years from now, maybe, but I think the hope is to have a largely-electric vehicle fleet in place before that.
On an unrelated note, the vernier in your signature might look better with a circle over the A, thus: Å
The US fleet turns over at about the 20 year mark, so I don’t think that we’ll see a largely electric vehicle fleet for at least 30 years, without some massive government projects, and its difficult to project the number of the cars on the road that far in advance, since there will no doubt be an effort to move large numbers of folks over to mass transit in the near future.
If I did that, then it wouldn’t look anything like a Recognizer! 
Only some carbon nanotubes are conductive, most of them are semi-conductive. Separating the two is no small feet. Controlled synthesis of carbon nanotubes in any real quantity is a very long way off. I don’t think it has even been done on the bench top.