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The misty and mighty mountaintops of tropical Far North Queensland. Experts say they're now vulnerable, in the face of impending climate change. There are more than 70 species of plants that are unique to the mountaintops of the Wet Tropics. Many of the species there - both plants and animals - are found nowhere else on earth, which is why the area was inscribed on UNESCO's World Heritage list over 30 years ago, in 1988.