Human activity contaminated this glacier before anyone stepped foot on it

New research suggests that contamination from the Industrial Revolution traveled over 6,000 miles from London to a Himalayan mountain. Researchers studied an ice sample that was extracted from a glacier on the highest peak ever drilled. The site on Mount Shishapangma sits at 23,600 feet above sea level.
Read more: https://www.cnn.com/2020/02/12/world/industrial-revolution-himalayan-glacier-scn-trnd/index.html?source=Snapzu