'Reefs collapse' presentation slideshows

Bleaching of the Australian Coral Reef

Bleaching of the Australian Coral Reef. Caroline Leahy Emily Ho Billy Castore. The Great Barrier Reef. The reef is 15 million years old in the north and 2 million years old in the south. The coral reef is 2,300km long, and there are tens of thousands of km of coral reefs in the world.

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