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Tuesday, March 28, 2017 29° Mostly cloudy



Australia's Great Barrier Reef, which scientists say may never recover from warming-driven coral bleaching last year (AFP Photo/WILLIAM WEST / MANILA BULLETIN)

‘Dead zones’ a threat to coral reefs

By Agence France-Presse Low-oxygen areas of the ocean known as dead zones threaten hundreds of coral reefs worldwide, fragile ecosystems already struggling because of climate…