People can deal with paper, metal, plastic, and compost as categories, particularly if they have different bins. What make it break down is that anything more c

People can deal with paper, metal, plastic, and compost as categories, particularly if they have different bins. What make it break down is that anything more complicated than intuitive categories will just result in people going for "good enough." Either make it have "good UI" and make sense to people or do single stream sort later.