| http://www.w3.org/ns/prov#value | - Gradual change is not guaranteed, as pointed out by the U.S. National Academy of Sciences in December 2013: ???The history of climate on the planet ??? as read in archives such as tree rings, ocean sediments, and ice cores ??? is punctuated with large changes that occurred rapidly, over the course of decades to as little as a few years.???
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