 |  | _________ |  Soil erosion, overfishing, and urban pollution persist
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 To help save the reefs of Australia, get active with these groups: Cairns and Far North Environment Centre Conservation Council of Western Australia Wildlife Preservation Society of Queensland
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The vast Great Barrier Reef, the world's largest, is at its healthiest away from population centers. Near the coast, though, eutrophication (overnutrition) from agricultural runoff is taking a toll on reefs, and there are new signs that the GBR isn't immune to large-scale disaster: The Great Barrier Reef Marine Park Authority confirmed in March 1998 that coral bleaching was killing reefs along a 620-mile stretch of the popular Queensland coast. | ||
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