character: Coral Reefs: Nature's Underwater Cities
topic: Impact of Climate Change on Marine Ecosystems
subject: Geography
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character: The Ocean's Temperature Rise
topic: Effects of Climate Change on Marine Life
subject: Geography
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character: The Great Barrier Reef
topic: Threats to Coral Ecosystems
subject: Geography
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character: Marine Biodiversity
topic: The Importance of Ecosystem Health
subject: Geography
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