Saving the Rainforest of the Ocean

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Coral reefs, considered the "rainforests" of the oceans by marine biologists, are home to a quarter of all marine life. These ecosystems are cornerstones for both the world's food chains and coastal economies. But scientists say carbon dioxide emissions are making oceans warmer and more acidic, and those problems could contribute to the complete demise of the world's coral reefs by the end of this century.

Correspondent Josh Zepps travels to a research station on the world's largest coral reef, Australia's Great Barrier Reef, to learn more about what's at stake, and to meet scientists working on ways to save the ocean's ecosystems.

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