San Franciscans take saving the earth very seriously, you can say almost everyone is an environmental activist. There are green bins for composting, and blue bins for recycling, almost everywhere. The San Francisco Mandatory Ordinance requires residents and businesses to separate compostables and recyclables from trash. Tourists and visitors are not exempted. Don’t ever litter, you will be fined or imprisoned depending on the gravity of the offense. Even dog owners whose pets litter the streets with poo are fined heavily. So take it very seriously, as it can have a tremendous effect on your trip if you are caught littering. Follow the rules and enjoy your trip.