Things not acceptable for recycling that end up in the recycling stream amount to the C word: contamination! We get a lot of yard waste. And plastic bags. And dirty diapers. And kitchen scraps. Get the picture? It’s all contaminating our stream! The best way to keep it clean is to commit to memory (or print it out and keep it handy) the list of the YEPs and NOPES of recycling here in Phoenix.