Off-road vehicles (ORVs) pose the fastest growing threat to America’s wild areas and should be banned from federal lands, the Wilderness Society says in a report released yesterday. The report lists the 15 most endangered wildlands in the U.S., many of which the group says are threatened by ORVs as well as by logging, mining, oil and gas development, and other activities. The list includes Alaska’s Arctic National Wildlife Refuge, California’s Sierra Nevada mountain range, Maine’s North Woods, and the greater Yellowstone area. The Wilderness Society is urging President Clinton to designate some of the threatened lands as national monuments.