I think of it this way: Right now, we produce this thing we call
"WASTE". It seems to be some kind of problem and right now it
probably is.
But, we'll figure out how to make good use of it. Example:
Plasma incinerators that split up junk into its constituent
elements. The tech already exists for it. Elements go into their
gaseous form (at least the gassy ones) and sucked up tubes and
collected.
More stuff like that, we'll be able to recycle anything, even
ourselves.