Dozens of people clutching bags full of plastic bottles and disposable cups queue at a busy bus terminal in the Indonesian city of Surabaya – where passengers can swap trash for travel tickets.The nation is the world's second-biggest marine polluter behind China and has pledged to reduce plastic waste in its waters some 70 percent by 2025 by boosting recycling, raising public awareness, and curbing usage.The Surabaya scheme has been a hit in the city of 2.9 million, with nearly 16,000 pa