Two-thirds of Great Barrier Reef hit by back-to-back mass coral bleaching – video

‘The combined impact of this bleaching stretches for 1,500km, leaving only the southern third unscathed,’ says Prof Terry Hughes, director of the ARC Centre of Excellence for Coral Reef Studies, who undertook aerial surveys in 2016 and 2017. He has warned Australia faces a closing window to take action on climate change in time to save the reef.
• Great Barrier Reef at ‘terminal stage’: scientists despair at bleaching data

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