
Global warming has led to a new travel boom as holidaymakers embrace what tour operators call doomsday tourism — the urge to see the world before its endangered parts disappear forever. Newly awakened to the perils facing the planet, American tourists are leading the charge to the melting glaciers of Alaska, Patagonia, the Arctic and Antarctic, the sinking islands of the Pacific and the fading glories of the Great Barrier Reef.
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