Today's Cancelled Trains
Warning: World's wildest places disappearing fast
A tenth of global wilderness has disappeared in a little over 20 years and if we don't act soon the rest will go, too, scientists are warning.
Researchers say a vast area -- some 3.3 million square kilometers (1.27 million square miles) -- has been lost since the early 1990s.
The impact has been greatest in the Amazon and central Africa, they say.
The study compared recent maps of wild areas free of significant human disturbance with ones produced in the same manner in the 1990s.
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