A little further south of Prachuap Khiri Khan, off the western shore of the Gulf of Thailand in the Chumphon Archipelago, is Koh Tao, a 21-square-kilometre island known for worldclass scuba diving and snorkelling, picture-perfect white sandy beaches, and invigorating yoga and wellness retreats.
But as tourism and development has burgeoned on Koh Tao over recent decades, the impacts on the environment have become a