[ExI] Lunar dirt

[Keith Henson]

Will someone enlighten me about what remote manipulators on the moon
are going to be doing?

You don't have a lot to work with; lunar dirt is about as far from
useful objects as I can imagine.

I have followed this topic since the mid 1970 and, far as I know,
there was never a believable flow chart with rock going in and useful
stuff coming out the other.

Take solar cells.  Anyone have an idea of what sort of plant it takes
make silicon?  What inputs the plant takes?  What has to be frequently
replaced?

Keith