Air quality and transportation: Emissions are on the decline, and efforts from the Federal to the local levels will help continue this trend. From: Public Roads | Date: July 1, 2003| Author: Jensen, Gary | COPYRIGHT 2003 Superintendent Of Documents. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Although the Clean Air Act contributes to cleaner air quality, the greatest success can be found in the control of emissions from on-road mobile sources. According to calculations based on data from the National Air Quality and Emissions Trends Report, 1999, published by the U.S. Environmental Protection Agency (EPA), emissions reductions from motor vehicles account for 84 percent of the total emissions reductions of the six criteria pollutants since 1970. The automotive, fuels, hi...

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