Snowmobile contributions to mobile source emissions in Yellowstone National Park

Article Abstract:

The increase in visitors to Yellowstone National Park over the past ten years has caused concern about environmental impact of snowmobile emissions, with the 1998 - 1999 winter season alone seeing over 1,300 snow coach and 62,000 snowmobile trips into the park. A study was conducted where 1,385 measurements of carbon monoxide (CO) and hydrocarbon (HC) emissions that were collected from snowmobiles at the southern and western entrances of the park were analyzed. The study showed that snowmobiles account for 27% of the annual emissions of CO and 77% of the annual emissions for HC, and that utilizing oxygenated fuels could reduce the amount of CO emissions by 6.5%.

United States, Research and Development in the Physical, Engineering, and Life Sciences, Land, mineral, wildlife conservation, Shipments data, Pollutants produced & recycled, All Other Transportation Equipment Manufacturing, Air Pollution Control R&D, Transportation equipment, not elsewhere classified, Nature Parks and Other Similar Institutions, National Parks, Snowmobiles, Statistical Data Included, Statistics, Pollution control industry, Leisure industry, Recreational vehicle industry, Air pollution, Air pollution research, Pollution control research, Yellowstone National Park

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Worldwide on-road vehicle exhaust emissions study by remote sensing

Article Abstract:

The impact of remote sensing systems in reducing worldwide on-road automobile exhaust emissions is examined in terms of ratios featuring carbon monoxide and hydrocarbon. Fleet studies indicated dominance by a small group of high emitters over average emissions. Vehicle maintenance emerged as a major factor in the deterioration levels of mean emissions. Emission control systems combined with proper maintenance showed optimal results in reducing emissions.

Maintenance and repair, Remote sensing, Maintenance

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On-road remote sensing of vehicle emissions in Mexico

Article Abstract:

The 1995 models of light-duty vehicles in Monterrey, Nuevo Leon, Mexico were found emitting 75% less carbon monoxide (CO), 70% less hydrocarbons (HC), and 65% less nitric oxide (NO) than pre-1995 models. The marked decrease in exhaust emission could be attributed to the introduction of light-duty vehichl exhaust emission standards and catalytic convertors.

Motor vehicle parts and accessories, All Other Motor Vehicle Parts Manufacturing, Industrial Gas Manufacturing, Industrial Organic Chemicals, Industrial gases, Cyclic Crude and Intermediate Manufacturing, Catalytic Converters (Auto), Nitric Oxide, Aromatic Hydrocarbons, Carbon Monoxide, Standards, Catalytic converters, Diesel motor exhaust gas, Diesel emissions, Hydrocarbon research, Nuevo Leon, Mexico

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