NEW YORK — Wars, pollution and logging are despoiling the world's mountain ranges, with the Alps of Europe and the Himalaya-Karakorum-Hindu Kush chain of Asia the most threatened, according to a U.N. study released yesterday. The once pristine mountain valleys of the Alps "are now a litter of cable cars, ski lifts, tourists facilities and car parks," said the report by the Tokyo-based United Nations University. Climbing expeditions have made Mount Everest "the highest garbage dump in the world," said Jack Ives, a professor at Carleton University in Canada who contributed to the report. Other ranges, including the Rockies, Cascades ...