Stretching for over 2300 kilometers, comprising over 900 islands and 2,900 individual reefs, the world’s largest coral reef system, Australia’s Great Barrier Reef is in danger. Once renowned for its water clarity and gorgeous corals, it became one of UNESCO’s World Heritage Sites in 1981. What’s Happening to the Reef? The World Wildlife Foundation states that the Reef is highly vulnerable. Coral bleaching is...