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- The average annual rates of carbon dioxide emissions varied by sector during the past 25 years -- Residential, 0.7 percent; Commercial, 1.6 percent; Industrial, -0.04 percent; Transportation, 1.4 percent.
- Carbon dioxide emissions grew in all sectors during the past decade.
- Carbon dioxide emissions in the Industrial sector are still lower than they were in the 1970's. This is partly due to a shift in the structure of the U.S. industry from energy-intensive basic industries (steel and chemicals), towards more complex and less raw material-intensive products -- a shift that can be partly due to fuel switching and increasing energy efficiency.
- Carbon dioxide emissions in the Transportation sector were stabilized in the early 1980's by the increasing fuel efficiency of post-1980 model cars. However, as vehicle fuel efficiency gains have diminished, transportation emissions have resumed their growth.
Source: For 1990-1997, Energy Information Administration, Emissions of Greenhouses Gases in the United States 1997, DOE/EIA-0573(97). (Washington, DC, report in preparation). For other years, EIA estimates based on unpublished analysis.
