Scientists know that air pollution particles from mid-latitude cities migrate to the Arctic and form an ugly haze, but a new University of Utah study finds surprising evidence that polar explorers saw the same phenomenon as early as 1870. "The reaction from some colleagues - when we first mentioned that people had seen haze in the late 1800s - was that it was crazy," says Tim Garrett, assistant professor of meteorology and senior author of the study, made at Utah University. (source: unews.utah.edu)
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