In dealing with most of the problems we face
on this planet, we consider Earth to be a closed
system. That is, everything we have on this planet
is all we get. With rare exceptions, nothing enters
or leaves the system. Furthermore, everything
affects everything else.
There is a wide variety of issues associated
with the manufacture, use, and discard of plastic
and paper bags. Each of these factors is linked
to countless other parts of the Earth system.