Carbon dioxide (CO₂) emissions in the United States increased by an estimated 3.1% in 2000, according to a report released in November by the U.S. Department of Energy’s Energy Information Administration. The 3.1% growth rate is well above the average annual growth rate of 1.6% in CO₂ emissions in the United States over the past decade. Although CO₂ is the largest contributor to U.S. greenhouse gas emissions, accounting for more than 80% of the total, emissions of other greenhouse gases, including methane and nitrous oxide, fell during 2000. Emissions of Greenhouse Gases in the United States 2000 is available at ftp://ftp.eia.doe.gov/pub/oiaf/1605/cdrom/pdf/ggrpt/
057300.pdf. —BRITT ERICKSON