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In photos: Climate change and Australia's Great Barrier Reef

Photos Logo Photos | Slide 1 of 14: In this May 2016 photo released by The Ocean Agency/XL Catlin Seaview Survey, an underwater photographer documents an expanse of dead coral at Lizard Island on Australia's Great Barrier Reef. Coral reefs, unique underwater ecosystems that sustain a quarter of the world's marine species and half a billion people, are dying on an unprecedented scale. Scientists are racing to prevent a complete wipeout within decades. (The Ocean Agency/XL Catlin Seaview Survey via AP)

In this May 2016 photo released by The Ocean Agency/XL Catlin Seaview Survey, an underwater photographer documents an expanse of dead coral at Lizard Island on Australia's Great Barrier Reef. Coral reefs, unique underwater ecosystems that sustain a quarter of the world's marine species and half a billion people, are dying on an unprecedented scale. 

© The Ocean Agency/XL Catlin Seaview Survey via AP
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