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One of the negative effects of climate change is the decline of polar bear populations. Taylor believes that "Polar bears, as a species, do not appear to be threatened or in decline based on the data that I’ve seen at the present time, although some populations do seem to be experiencing deleterious effects from climate change." Taylor was not invited to the 2009 meeting of the Polar Bear Specialist Group (PBSG) in Copenhagen, though he had been a participant in previous PBSG meetings from 1981 to 2005.