From: xxxxxx@shadowgard.com
>
> actually, it coccurs to me that much of civilization consists of high
> value resources for nanomachines run amok.
>
> Plastics may not have much in the way of neded materoisals, but they
> make an excellent energuy source. React all that carbon and hydrogen
> with oxygen for power.

Plastics are pretty inconvenient power sources, while they do have substantial energy content it's a fairly substantial amount of labor to extract it, which is why pretty much nothing does. Metals have a similar problem.