Figure 1 - National Transportation Emissions Trends Index: 1970-1998

1970 = 1.0; 1990 = 1.0 for PM-2.5 and ammonia

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Carbon monoxide (CO)

Volatile organic compounds (VOC)

Particulate matter 2.5 microns in diameter or smaller (PM-2....

Figure 1 - U.S. Carbon Dioxide Emissions from Energy Use by Sector: 1990 and 1999

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NOTES: Electric utility emissions are distributed across end-use sectors. Numbers may not add to totals due to rounding. Tons of carbon can be converted to tons of...

Table 2 - Wetlands Lost and Created Under the Federal Aid Highway Program: 1996-2000

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Figure 1 - Disposal/Use of Material Dredged by the U.S. Army Corps of Engineers

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Key to terms used: Beach nourishmentbeach restoration in which hydraulically pumped dredge material is directly placed onto an eroded beach. Confinedplacement of dredged...

Figure 1 - Energy Intensities of Passenger Modes: 1980-1998

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Automobiles

Buses

Certificated air carriers

Rail

KEY: Btu = British thermal units.

SOURCE: Stacy C. Davis, Transportation Energy Data Book, Edition...

Table 1 - Leaking Underground Storage Tank Releases and Cleanups

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Figure 1 - Transportation's Share of U.S. Petroleum Use: 1973-1999

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SOURCE: U.S. Department of Energy, Energy Information Administration, Annual Energy Review 1999 (Washington, DC: July 2000), table, 5.12.

Table 1 - Reported Oil Spills in U.S. Waterways: 1989-1999

Thousands of gallons

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Table 2 - Growth-Related Environmental Issues and Impacts

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Figure 2 - People Living in High Noise Areas Around U.S. Airports

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NOTE: The DOT Performance Plan (FY 2001) and Report (FY 1999) lists a preliminary estimate of 680,000 people exposed in 1999.

SOURCES: Exposure: U.S. Department of...