Philadelphia should consider mandating clear trash bags. Oswego County, NY
has done this. It makes it easier to enforce participation in my opinion.
Philadelphia should also (if not allready) accept commingled recyclables to
be placed in a recycling bin or labeled container or clear plastic bag and
accept mixed paper in a paper bag, labeled container or clear plastic bag.
Options make it easier for participation. So long as commingled cans/bottles
and mixed paper are separated into those two categories it shouldn't really
matter what type of container they're in.