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Great Barrier Reef at Risk - 29 Jun 2015
Sediment can be seen in the water as ships and boats sail past the coastal town of Hervey Bay, north of Brisbane in Queensland, Australia, June 9, 2015. UNESCO World Heritage delegates recently snorkelled on Australia’s Great Barrier Reef, thousands of coral reefs, which stretch over 2,000 km off the northeast coast. REUTERS/David Gray