Air Quality Concerns Related to Snowmobile Usage in National Parks
http://www2.nature.nps.gov/air/Pubs/pdf/Snowmobile_Report.pdf

National Park Service, Air Resources Division

This National Park Service report from February 2000 summarizes the air quality impacts of snowmobiles in the 40 park units that allow their use, with a focus on Yellowstone National Park. It includes sections such as background, emissions, air quality and exposure, potential effects, emission reduction, and management considerations. The 34-page report consists of text with several tables and a graph.

This resource is referenced here:

• Integrating Research and Education:Yellowstone: Human Impacts and Hazards
• Integrating Research and Education:Yellowstone: Policy and Management

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Subject: Environmental Science:Air Quality:Pollutants, Geoscience:Atmospheric Science:Meteorology:Air quality, Air quality:Dust and Particulates, Environmental Science:Air Quality:Dust and Particulates, Environmental Science:Policy:Environmental Decision-Making, Geoscience:Atmospheric Science:Meteorology:Air quality:Pollutants
Resource Type: Scientific Resources:Research Results, Datasets and Tools:Datasets
Environmental Policy: Environmental Decision-Making
Focus on Yellowstone: Policy and management