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    The Great Barrier bleaching

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The Great Barrier bleaching

Australia's Great Barrier Reef is undergoing its most severe coral bleaching episode in history. Christiane Amanpour has more on this unparalleled crisis.

The Great Barrier bleaching

Australia's Great Barrier Reef is undergoing its most severe coral bleaching episode in history. Christiane Amanpour has more on this unparalleled crisis.