Emissions include hydrocarbons, nitrogen oxides, MTBE, particulate matter, and carbon monoxide. These compounds have been found to cause cancer and other health problems. Snowmobiles are a tremendous danger to wildlife. Studies show that Bald eagles and Grey wolves, both of which are endangered species, are threatened by these vehicles. Other species such as bison, white tailed deer, elk, birds and small mammals are also vulnerable.
Carbon monoxide causes dizziness, headaches, throat irritation, and nausea.
Park Rangers at entrance stations complained that they were feeling ill, and the Park Service now pumps fresh air into its offices. Accidents are a major concern. According to a study in Public Health Reports, Dr. Michael Landen of New Mexico State concludes that snowmobile operators are nearly nine times more likely to die or be injured in accidents than automobile drivers, on a mile per mile comparison. Over 60 environmental organizations signed onto the petition, including the National Resources Defense Council, Minnesotans for Responsible Recreation, and Friends of the Earth. Along with the National Park Service, we have petitioned five other agencies to study or regulate snowmobiles.