Emissions of Greenhouse Gases in the United States 1997 - Table 33. Net Carbon Flux from Land Use Change and Forestry, 1990-1997

Table 33. Net Carbon Flux from Land Use Change and Forestry, 1990-1997
(Million Metric Tons Carbon Equivalent)

Description	1990	1991	1992	1993	1994	1995	1996	1997
Forests
Trees	95.6	95.6	95.6	74.0	74.0	74.0	74.0	74.0
Understory	2.4	2.4	2.4	1.3	1.3	1.3	1.3	1.3
Forest Floor	20.8	20.8	20.8	9.8	9.8	9.8	9.8	9.8
Soil	155.2	155.2	155.2	86.3	86.3	86.3	86.3	86.3
Total Forests	274.2	274.2	274.2	171.3	171.3	171.3	171.3	171.3
Harvested Wood
Wood Products	17.9	17.9	17.9	17.9	17.9	17.9	17.9	17.9
Landfilled Wood	19.4	19.4	19.4	19.4	19.4	19.4	19.4	19.4
Total Harvested Wood	37.3	37.3	37.3	37.3	37.3	37.3	37.3	37.3
Total Net Flux	311.5	311.5	311.5	208.6	208.6	208.6	208.6	208.6
Source: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990-1997, EPA-R-236-99-003 (Washington, DC, April 1999), p. 6-2, drawing on the work of Richard Birdsey and Linda Heath of the U.S. Forest Service. See web site www.epa.gov/globalwarming/1999-inv/landuse.pdf.