Energy and Environment
Consequences of transportation for the human and
natural environment (chapter 2, section E)
vehicles emitted 82% of all transportation carbon dioxide emissions in 2005.
emitted 54% of the nation's pollution from carbon monoxide, 36% of nitrogen
oxides, 22% of volatile organic compounds, and 1.4% of sulfur dioxide in
2006. All of these emissions have
declined in the last decade despite a rise in vehicle-miles of travel. [E-3]