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Appendices - GSA

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Methane Emissions from Manure Management (Tonnes/Year)<br />

The following animal types were included in this analysis: dairy cows, beef cows,<br />

hogs and pigs, sheep, chickens and layers, broilers, and turkey. The methane<br />

emissions were calculated by animal type and manure management system from<br />

USDA, National Agricultural Statistics Service, 2002 data. [ref. 1]<br />

Methane Emissions from Domestic Wastewater Treatment (Tonnes/Year)<br />

The methane generation is estimated using the methodology from the EPA<br />

Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2003 and from<br />

U.S. Census Bureau, 2000 Population data<br />

http://www.nrel.gov/docs/fy06osti/39181.pdf. [ref. 1]<br />

Figure A-6: Biomass resources in the U.S. by tonnage<br />

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