Because the arctic temperature record would probably not require any of the climategate urban heat island adjustments it would seem to definitively sustain that global temperatures are significantly rising. This would seem to form the most unequivocal and verifiable proof that rhetoric to the contrary is simply false.
List of Arctic weather stations that are the source of the Arctic temperature record: https://en.wikipedia.org/wiki/List_of_research_stations_in_the_Arctic
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