Emissions Reductions as a Result of Automobile Improvement
Chemistry and Biochemistry
Atmospheric chemistry, Emissions, Pollutants
Remote sensing of light duty vehicle on-road tailpipe exhaust has been used to measure on-road mass emissions of automobile fleets in Denver for 13 years and in two other U.S. cities for 5 years. Analysis of these fleets shows that newer automobiles, during a period of fairly constant new car standards, have become continually less polluting independent of measurement location. Improving emissions control technology spurred by federal regulations is thought to have brought about these trends.
Copyright held by the American Chemical Society.
Pokharel, S. S.; Bishop, G. A.; Stedman, D. H., Emissions reductions as a result of automobile improvement. Environ. Sci. Technol. 2003, 37, 5097-5101, DOI: 10.1021/es026340x.