Scope of Great Barrier Reef's massive coral bleaching alarms scientists

Scope of Great Barrier Reef's massive coral bleaching alarms scientists  NBCNews.com 2016 Ocean Heatwave Killed 30 Percent of the Great Barrier Reef  Smithsonian Heat waves are roasting reefs, but some corals may be resilient  Science News Since 2016, Half of All Coral in the Great Barrier Reef Has Died  The Atlantic Hey, climate-change mitigators, you can start right now, with the Great Barrier Reef!  Washington PostFull coverage

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