Vision for a Renewable Scotland:Are We All Better Together? | Iain Staffell
Life Cycles and Carbon Footprints | Wiedmann
1. The Rights and Wrongs of Carbon Accounting About life cycles and footprints in the carbon world Carbon Accounting Conference Heriot-Watt University, Edinburgh - 11 March 2009
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3. Forum for the Future (2008) Getting to Zero: Defining Corporate Carbon Neutrality GHG Protocol – Boundary Setting
5. System completeness vs truncation Product 1 Product 2 Carbon footprint (t CO 2 -e) Production layer
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7. Method 1: Process LCA Table 1. Flows of products between unit processes Table 2. Flows of environmental intervention by unit processes Production of Steel Electricity Production Production of Toaster Use of Toaster Disposal of toaster Steel (kg) 1 - 0.5 - 2 0 0 Electricity (kWh) - 0.5 1 - 0.1 - 1 0 Toaster (unit) 0 0 1 - 1 0 Toast (piece) 0 0 0 1000 0 Waste disposal service (kg disp.) 0 0 0 -1 1 Production of Steel Electricity Production Production of Toaster Use of Toaster Disposal of toaster CO 2 (to air, kg) 1 4 2 1 0.5
8. Process LCA Model Process specific Strengths Weakness Truncation, laborious Method 1: Process LCA
12. Why a hybrid approach? Process LCA Input-Output LCA Model Process specific Encompassing system boundary Strengths Weakness Truncation Aggregation Hybrid LCA Process specific Encompassing system boundary Process specific Encompassing system boundary