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<br />Page 12 of 22 <br /> <br /> <br />Over 50 years: <br />9,200 kg CO₂/year×50 years=460,000 kg CO₂9,200 kg CO₂/year×50 <br />years=460,000 kg CO₂ <br />Cob Building: Assuming zero operational emissions since it doesn't use <br />electricity, heating, or cooling. <br />Total Carbon Emissions: <br />Conventional Building: <br />Embodied Carbon+Operational Carbon=14,864 kg CO₂+460,000 kg <br />CO₂=474,864 kg CO₂ <br /> <br />Cob Building: Embodied Carbon=1,486.4 kg <br /> <br />Savings: <br />Savings=474,864 kg CO₂−1,486.4 kg CO₂=473,377.6 kg CO₂ <br />Converting to Tons: <br />473,377.6 kg CO₂÷1000=473.38 tons CO₂ <br /> <br />Conclusion <br />A 400 square foot cob building can save approximately 473.38 metric <br />tons of greenhouse gas emissions over 50 years compared to a similarly <br />sized conventional building that uses electricity, heating, and cooling. <br />References: <br />1. Embodied Carbon in Building Materials: <br />• Concrete, Steel, Insulation, and Drywall: <br />o Hammond, G., & Jones, C. (2011). Embodied Carbon: The <br />Inventory of Carbon and Energy (ICE). University of Bath. <br />o Architecture 2030, Carbon Smart Materials Palette. <br />https://materialspalette.org/ <br />• Cob Construction: <br />o King, B. (2017). The New Carbon Architecture: Building to <br />Cool the Planet. New Society Publishers. <br />o Lawrence, M., Fodde, E., & Heath, A. (2009). Building with <br />Cob – A Traditional Earth Building Material. <br />• 2. Operational Carbon Emissions: <br />• Average Household Energy Use: <br />o U.S. Energy Information Administration (EIA). (2020). How <br />much electricity does an American home use?Link <br />o EPA, Greenhouse Gas Equivalencies Calculator. <br />https://www.epa.gov/energy/greenhouse-gas- <br />equivalencies-calculator <br />• Carbon Emission Factors: <br />Docusign Envelope ID: 61C3903E-05FE-49FE-A6AF-E50B7D61917E