A particularly vital part of this is protecting the Great Barrier Reef. The world's largest living structure is a World Heritage Area and one of the seven natural wonders. It's no surprise that it is also one of the most popular tourist attractions on the planet. However, sadly, half the coral in the reef has died since 2016. The Commonwealth and Queensland Government's Reef 2050 Long-Term Sustainability Plan therefore aims to protect the reef and ensure its future.