a friend of mine who spends a LOT of his time picking up plastic waste from parks, rivers, streets, etc. had a good idea. He decided to photograph the non biodegradable waste and tag companies on social media with it. So if he finds a plastic Subway cup, he tells Subway about it with the message "is this yours?" I dig this because it's not something that blames the consumer. It puts the blame where it belongs: on the producer.