One of the things I’ve seen at universities a lot are signs on the recycling and garbage bins saying what is allowed and not. Maybe recycling bins could have more of that to help people know what’s okay or not.
Do you think it’d help if the plastic type label was color coded too? Say yellow for PET, red for HDPE, etc, to help people recycle only the right plastics.
Generally I’ve seen that it’s not that people don’t understand recycling, it’s that it takes energy and effort to figure out what to do and it’s not always easy.