Reports from Australian scientists claim that the Great Barrier Reef is in a state of 'terminal' decline (https://www.theguardian.com/environment/2017/apr/10/great-barrier-reef-terminal-stage-australia-scientists-despair-latest-coral-bleaching-data). The coral bleaching events (where the animal dies, leaving only the 'skeleton') appear to be more wide-spread and spaced closer together in time. Much of the damage has been linked to human activities such as waste disposal and gas emissions but some people who depend on tourism are claiming that the scientists are exaggerating. It seems pretty clear, however, that human activities will have to be modified if this natural wonder is to survive.
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