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## Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base (1992) Committee on Science, Engineering, and Public Policy (COSEPUP)

### Citation Manager

. "M Landfill Methane Reduction." Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base. Washington, DC: The National Academies Press, 1992.

 Page 808

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Page 808

### Appendix M Landfill Methane Reduction

As shown in Chapter 25, the potential emission reductions for CH4 from landfills are given in column 1 of Table 25.8.1 Under regulatory alternative 2, emissions from existing landfills can be reduced by 60 percent, and new landfills by 65 percent. Multiplying these percentages times the CH4 emissions in Table 25.7 as shown below yields 11.1 Mt of CH4 emission reduction per year.

 Existing 18 × 0.60 = 10.8 New 0.53 × 0.65 = 0.34 TOTAL CH4 = 11.1 Mt/yr

Next, this number must be converted to CO2 equivalence. Information from the IPCC shows that each kilogram of CH4 is equivalent to 21 times the global warming potential of CO2 for a 100-yr time horizon. Therefore

11.1 Mt CH4/yr × 21 CO2 eq./CH4 = 233 Mt CO2 eq./yr

and

(\$22.5/t CH4)(1 CH4/21 CO2) = \$1.07/t CO2 eq.

Although these estimates are for 1997, it is assumed that they would be roughly the same for 1990.

#### Note

1. Tons (t) are metric; 1 Mt = 1 megaton = 1 million tons.

 Page 808
 Front Matter (R1-R26) Part One: Synthesis (1-2) 1 Introduction (3-4) 2 Background (5-11) 3 The Greenhouse Gases and Their Effects (12-28) 4 Policy Framework (29-35) 5 Adaptation (36-47) 6 Mitigation (48-64) 7 International Considerations (65-67) 8 Findings and Conclusions (68-72) 9 Recommendations (73-83) Individual Statement by a Member Of The Synthesis Panel (84-86) Part Two: The Science Base (87-88) 10 Introduction (89-90) 11 Emission Rates and Concentrations Of Greenhouse Gases (91-99) 12 Radiative Forcing and Feedback (100-110) 13 Model Performance (111-116) 14 The Climate Record (117-134) 15 Hydrology (135-139) 16 Sea Level (140-144) 17 A Greenhouse Forcing and Temperature Rise Estimation Procedure (145-152) 18 Conclusions (153-154) Part Three: Mitigation (155-156) 19 Introduction (157-170) 20 Framework for Evaluating Mitigation Options (171-200) 21 Residential and Commercial Energy Management (201-247) 22 Industrial Energy Management (248-285) 23 Transportation Energy Management (286-329) 24 Energy Supply Systems (330-375) 25 Nonenergy Emission Reduction (376-413) 26 Population (414-423) 27 Deforestation (424-432) 28 Geoengineering (433-464) 29 Findings and Recommendations (465-498) Part Four: Adaptation (499-500) 30 Findings (501-507) 31 Recommendations (508-514) 32 Issues, Assumptions, and Values (515-524) 33 Methods and Tools (525-540) 34 Sesitivities, Impacts, and Adaptations (541-652) 35 Indices (653-656) 36 Final Words (657-658) Individual Statement by a Member of the Adaptation Panel (659-660) Appendixes (661-662) A Questions and Answers About Greenhouse Warming (663-691) B Thinking About Time in the Context of Global Climate Change (692-707) C Conservation Supply Curves for Buildings (708-716) D Conservation Supply Curves for Industrial Energy Use (717-726) E Conservation Supply Data for Three Transportation Sectors (727-758) F Transportation System Management (759-766) G Nuclear Energy (767-774) H A Solar Hydrogen System (775-778) I Biomass (779-785) J Cost-Effectiveness of Electrical Generation Technologies (786-791) K Cost-Effectiveness of Chlorofluorocarbon PhaseoutÂ—United States and Worldwide (792-797) L Agriculture (798-807) M Landfill Methane Reduction (808-808) N Population Growth and Greenhouse Gas Emissions (809-811) O Deforestation Prevention (812-813) P Reforestation (814-816) Q Geoengineering Options (817-835) R Description of Economic Estimates of the Cost of Reducing Greenhouse Emissions (836-839) S Glossary (840-846) T Conversion Tables (847-848) U Prefaces from the Individual Panel Reports (849-854) V Acknowledgments from the Individual Panel Reports (855-857) W Background Information on Panel Members and Professional Staff (858-868) Index (869-918)

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Page 808 Appendix M Landfill Methane Reduction As shown in Chapter 25, the potential emission reductions for CH4 from landfills are given in column 1 of Table 25.8.1 Under regulatory alternative 2, emissions from existing landfills can be reduced by 60 percent, and new landfills by 65 percent. Multiplying these percentages times the CH4 emissions in Table 25.7 as shown below yields 11.1 Mt of CH4 emission reduction per year. Existing 18 × 0.60 = 10.8 New 0.53 × 0.65 = 0.34   TOTAL CH4 = 11.1 Mt/yr Next, this number must be converted to CO2 equivalence. Information from the IPCC shows that each kilogram of CH4 is equivalent to 21 times the global warming potential of CO2 for a 100-yr time horizon. Therefore 11.1 Mt CH4/yr × 21 CO2 eq./CH4 = 233 Mt CO2 eq./yr and (\$22.5/t CH4)(1 CH4/21 CO2) = \$1.07/t CO2 eq. Although these estimates are for 1997, it is assumed that they would be roughly the same for 1990. Note 1. Tons (t) are metric; 1 Mt = 1 megaton = 1 million tons.

Representative terms from entire chapter:

landfill methane