See them before they’re gone! Some of the world’s most awe-inspiring sights are threatened by encroaching development and climate change. Many could disappear in our lifetime.Filed under:
Great Barrier Reef, Australia
The world’s biggest structure made by living organisms, Australia’s Great Barrier Reef can be seen from outer space and is a UNESCO World Heritage site. But the survival of the reef is threatened by rising ocean temperatures and mass coral bleaching, and it could be completely gone in our lifetime.
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