AUSTRALIA-CONSERVATION-REEF-ENVIRONMENT

A photo taken on September 22, 2014, shows a dive instructor from the Ocean Freedom diving on Australia's Great Barrier Reef. The 2,300-kilometre-long reef contributes AUS$5.4 billion (US$4.8 billion) annually to the Australian economy through tourism, fishing, and scientific research, while supporting 67,000 jobs, according to government data. According to an Australian government report in August, the outlook for the Earth's largest living structure is "poor", with climate change posing the most serious threat to the extensive coral reef ecosystem. AFP PHOTO/William WEST / AFP / WILLIAM WEST