Figure 74 - Nitrogen Oxide Emissions by Mode: 1991-2001

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Figure 74 - Nitrogen Oxide Emissions by Mode: 1991-2001. If you are a user with a disability and cannot view this image, use the table version. If you need further assistance, call 800-853-1351 for further assistance.

SOURCE: U.S. Environmental Protection Agency (EPA), Office of Air Quality Planning and Standards, National Emissions Inventory, Air Pollutant Emission Trends, available at http://www.epa.gov/ttn/chief/trends/index.html/, as of August 2003.

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