How dead is the Great Barrier Reef?

Coral bleaching is the biggest threat to the Great Barrier Reef. But it's too early for obituaries.
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Sources:
https://www.eposters.net/pdfs/the-201...
http://www.globalcoralbleaching.org/
http://catlinseaviewsurvey.com/gallery
https://www.coralcoe.org.au/media-rel...
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NBC 1970 https://archive.org/details/greatbarr...
Guillaume Debever https://vimeo.com/82607901
Martin Lalonde https://vimeo.com/119572437

Australia's Great Barrier Reef is the largest coral reef system in the world and the only living structure visible from space. Although ecosystem managers in Australia have worked hard to preserve the reefs, the past couple of decades have brought a new threat that can't be solved by any one country alone: human-induced global warming. Rising ocean temperatures have caused mass coral bleaching in coral reefs around the world, in every tropical ocean from the Caribbean to the South Pacific. This is now considered to be the biggest threat that coral reefs face, and they face many, including overfishing, pollution, storm damage, and invasive species.

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