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Ten Places to See Before It's Too Late

 
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Ten Places to See Before It's Too Late
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The Great Barrier Reef (1/10)

The Great Barrier Reef off the northeast coast of Australia is the largest coral reef system in the world with almost 3,000 individual reefs and 900 islands stretching over 344,000 square kilometers. About two million people visit the Great Barrier Reef every year.

Climate change is the biggest threat to the reef. In recent years, rising water temperatures have caused coral bleaching and forced certain marine species to leave. Due to mass tourism and pollution, the water quality has declined and many parts of the reef have been damaged. The Belize Barrier Reef, the second largest coral reef system, faces the same threats from climate change and tourism. (Photo: Shutterstock)

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