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The Great Barrier Reef is dying, and tourists from all over the world are rushing to see it while there's still time.
Nearly 70 percent of people who visited the reef in 2015 said they made the trip to Australia to witness its beauty before it's gone.
Almost half of the reef's coral has vanished over the past three decades, thanks to warming ocean temperatures, invasive species and coastal development.
One of the study's authors wrote in The Conversation, "There's a vicious cycle at play here: tourists travel to see a destination before it disappears, but in so doing they contribute to its demise, either directly through on-site pressures or ... through greenhouse gas emissions."