“The pure white snow atop the Andes Mountains may not be so pure after all. Scientists have found traces of toxic pollutants called PCBs in snow samples taken from Aconcagua Mountain, the highest peak in the Americas. While the overall PCB levels were quite low, the results show that these long-lasting contaminants, notorious for causing myriad health problems, can end up at altitudes as high as 20,340 feet (6,200 meters), making their way through the atmosphere to these remote areas
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Snow at highest elevations no longer pure
