Great Barrier Reef: climate change wreaking havoc
The Great Barrier Reef was awarded UNESCO World Heritage status in 1981. It consists of almost 3,000 individual coral reefs and extends for about 2,300 kilometers (1,430 miles). But due to climate change and rising water temperatures, it has lost more than half of its coral. Storms, gas drilling and shipwrecks also pose threats to the World Heritage status of the underwater wonderworld.