Winter Motor Vehicle Emissions in Yellowstone National Park
Environmental Science & Technology
Air-pollution emissions from off-road recreational vehicles have risen in national importance, even as emissions from these vehicles have declined (1). Yellowstone National Park in the U.S. has a long history of balancing tourist access and ecosystem protection and has become a battleground over snowmobile usage. Approximately 3 million people visit the park annually, but <5% of them visit during winter (2). Historically, winter motorized access has been allowed only over groomed roads by snowcoach or 2-stroke snowmobile. The snowcoach fleet includes a number of vintage Bombardiers (see photo on the next page) and an assortment of modern, wheeled vans, buses, and large sport utility vehicles that have been converted to over-snow use with various track and ski systems (3).
Bishop, Gary A, Daniel A. Burgard, Thomas R. Dalton, Donald H. Stedman, and John D. Ray. "Winter Motor-Vehicle Emissions in Yellowstone National Park." Environmental Science & Technology. 40.8 (2006): 2505-2510. Print.