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Sustainable Production & Consumption. Life Cycle Assessment Case studies Streamlined Life Cycle Assessment Does more consumption make you happy? Competition. Life Cycle Assessment. Environment. System. Functional Outputs. Inputs. Emissions/Wastes. Subsystems. Life Cycle Assessment.
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Sustainable Production & Consumption • Life Cycle Assessment • Case studies • Streamlined Life Cycle Assessment • Does more consumption make you happy? • Competition
Environment System Functional Outputs Inputs Emissions/Wastes Subsystems Life Cycle Assessment
Materials Acquisition Outputs Inputs Principal Products Formulation, processing and Manufacturing Materials Coproducts Product Distribution Energy Water effluents Water Product use Airborne emissions Air Recycle, products, components, materials Solid Waste Other Environmental interactions Waste Management Life Cycle Assessment
x2 x3 x1 x4 Extraction Production Use Disposal FU CO2 = 0.2 kg/t CH4 = 0.1 kg/t x1 = 2t/tFU CO2 = 0.1kg/t CH4 = 0.1kg/t x3 = 1t/tFU CO2 = 0.3 kg/t CH4 = 0.1 kg/t x2 = 1.5t/tFU CO2 = 0.1kg/t CH4 = 0.3kg/t x4 = 0.5 t/tFU Life Cycle Assessment The system in this example has one functional output and each activity i from extraction of raw materials to final disposal generates a certain amount of CO2 and CH2.
Life Cycle Assessment Using the Environmental Burdens equation the total environmental burdens per functional unit related to the emissions of CO2 and HC4 are therefore BCO2 = ∑bcCO2 . xi = (0.2)2+(0.3)1.5+(0.1)1+(0.1)0.5 →BCO2 = 1.0 kg/tFU BCH4 = ∑bcCH4 . xi = (0.1)2+(0.1)1.5+(0.1)1+(0.3)0.5 →BCH4 = 0.6 kg/tFU
Life Cycle Assessment • The impacts most commonly considered in LCA are • Non-renewable resource depletion • Global warming • Ozone depletion • Acidification • Eutrophication • Photochemical oxidant formation • Human toxicity • Aquatic toxicity
Life Cycle Assessment EGWP = (ecCO2)BCO2 + (ecCH4)BCH2 = 1(1) + 21(0.6) → EGWP = 13.6 kg CO2 equiv / tFU
Environmental Impact of Mobile Phones Manufacture 9kg Use 12kg Total Accumulated Emissions 21kg
Environmental Impact of Mobile Phones Manufacturing 25kg Use 12kg Total Accumulated Emissions 37kg
Fully Comprehensive LCA Currently Accessible Region Extensive LCA Streamlined LCA LCA Scoping Streamlined Life Cycle Assessment
Sustainability of PC’s The Internet The Rest Of The World System Boundary PC User
Does more consumption make you happier? Happiness Money
Sustainable Production & Consumption • Life Cycle Assessment • Case studies • Streamlined Life Cycle Assessment • Does more consumption make you happy? • Competition