Two-thirds of Great Barrier Reef damaged
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Two-thirds of Great Barrier Reef damaged

Scientists from the Australian Research Council's Centre of Excellence for Coral Reef Studies say mass coral bleaching has damaged the World Heritage site for two years in a row.

The latest damage is concentrated in the middle section, whereas last year's bleaching hit mainly the north and experts are worried that the coral might not be able to recover.

Go to next video: What is coral bleaching?