Table 4. Greenhouse Gas and Carbon Profile of the U.S. Forest Products Industry.

	greenhouse gas emissions (TgCO2-eq.; negative numbers indicate sequestration)
profile element	1990	2004 − 2005	uncertainty range (%) 2005	uncertainty range (TgCO2-eq.) 2005
1. changes in stocks of carbon in forestsa	0a	0a	—b	−20 to +20c
2. changes in stocks of carbon in forest products	−132.6	−108.5	±24	−134.5 to −82.5
3. direct emissions from forest products manufacturing	76.1	64.6	±15	54.9 to 74.3
4. emissions associated with producing fiber	4.0	4.2	−50 to +100c	2.1 to 8.4
5. emissions associated with nonfiber inputs	24	24	−50 to +200c	12 to 72
6. indirect emissions associated with purchased electricity	42.4	43.6	±25c	32.7 to 54.5
7. emissions related to transport of raw materials and products	16.9	19.6	−50 to +100c	9.8 to 39.2
8. emissions associated with product use	0	0	0	0
9. emissions associated with product end-of-life (landfill CH4)	61	56	−41 to +34	33 to 75
net transfers to the atmosphere	91.8	103.5	−75 to +91	25.8 to 197.7
10a. avoided emissions associated with recycling recovered paper	−d	−13 to −115	−d	−d
10b. avoided emissions associated with using wood-based building materials	−d	−7.2	−d	−d

^aStable long-term forest stocks are consistent with the data and the principles of sustainable forest management practices on U.S. industrial timberlands. Other privately owned forestlands continue to accrue large amounts of carbon.

^bPercentage uncertainty is undefined when based on a value of zero.

^cBounds based on the best professional judgment of the authors.

^dNot estimated.