I place my empty pizza box with grease stains in the recycle bin with the other paper. It’s a sin according to the recycling brochure but I defy the rule makers and I feel deep guilt for doing it.
So much guilt has built up in me that I’ve increased my pizza intake to twice a week to try to assuage the psychological harm the recycling brochure has caused me.
Pizza boxes always go in the cardboard recycle.