It's nice to care about the enviorment.
Frank is walking to work in the morning while he finishes drinking a coffee he picked up from a local shop.
Frank wants to dispose of his coffee cup.
Frank holds onto the empty cup until he arrives at work where he can throw it into the recycling.
Frank doesn't see any trash bins, so he tosses the empty coffee cup into the street.
Mark feels normal and the city street stays relatively clean for everyone who uses it.
Mark feels guilty and the coffee cup eventually needs to be picked up by volunteers who clean the city streets.