Plastic waste is a huge problem in Indonesia, and this has led the country’s second-largest city to come up with a novel approach to encourage residents to recycle — free bus rides in exchange for used plastic bottles and cups. The city of Surabaya launched the initiative back in April, and commuters can ride city buses by either dropping off the plastic bottles and cups at terminals or using the plastic items to pay their fare directly. Under the new recycling initiative, a two-hour bus ticket costs up to five plastic bottles or 10 plastic cups, depending on the size.