GHG reduction potential of changes in consumption patterns
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GHG reduction potential of changes in consumption patterns Evidence from Swiss household consumption survey. Bastien Girod and Peter de Haan Institute for environmental decisions (IED), ETH Zurich. Structure of presentation. Relevance of the research question Method

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GHG reduction potential of changes in consumption patterns Evidence from Swiss household consumption survey

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Ghg reduction potential of changes in consumption patterns evidence from swiss household consumption survey

GHG reduction potential of changes in consumption patternsEvidence from Swiss household consumption survey

Bastien Girod and Peter de Haan

Institute for environmental decisions (IED), ETH Zurich


Structure of presentation

Structure of presentation

  • Relevance of the research question

  • Method

    • Estimate of GHG emissions of consumption

    • Deriving high and low emitters

  • Results

  • Conclusion


Why potential of changing consumption for reducing ghg emissions matters

Why potential of changing consumption for reducing GHG emissions matters

  • Problem: Very costly/ hardly feasible to reach low GHG stabilization level only using changing technologies

  • “We need to change our consumption patterns” RajendraPachauri 05.07.2009

  • Research questions:

    • What is potential influence of changing consumption patterns?

    • Which consumption characteristics make the difference between high and low emitters?


Method for bottom up estimate

Methodforbottom-upestimate

  • Household consumption data (N=14’580)

    • Surveys 2000 to 2003; all purchases of one month

    • 450 consumption categories

    • Additional data: Durable goods & household characteristics

  • Derive functional unit of consumption

    • Example: kg food, pkm car, m2 shelter, hr service

  • Connect with LCA process  GHG emissions


Derive functional physical units

Derive functional (physical) units

 Resulting GHG estimates comparable to studies using EIO data and expenditure survey or top-town data


What is the potential of changing consumption

Whatisthe potential ofchangingconsumption?

  • Best-practice-consumption: 10% ofhouseholdswithlowest GHG emissions

  • Worst-practice-consumption: 10% ofhouseholdswithhighest GHG emissions

  • Advantage:

    • Noassumption on whatwouldbepossible

    • Consistentconsumptionpattern (reboundincluded)


Ghg emissions of household types

GHG emissionsofhouseholdtypes


Ghg emissions of household types1

GHG emissionsofhouseholdtypes


Ghg emissions of household types2

GHG emissionsofhouseholdtypes


Ghg emissions hh type income group

GHG emissions hh type & income group


Same income group and household type

Same income group and household type


Same income group and household type1

Same income group and household type


Comparison of high and low emitters

Comparison of high and low emitters

Mean


Ghg emissions kgco 2 e yr

GHG emissions [kgCO2e/yr]


High and low emitters matter

High and low emitters matter

For instance, the Swiss Kyoto target of reducing

GHG emissions by 8 percent (compared to 1990)

by 2010 could be reached if:

  • the share of households showing best-practice consumption were to increase by 15 percent

  • 9 percent of the households showing worst-practice consumption patterns were to shift to a consumption pattern with average emissions


Expenditure chf yr

Expenditure[CHF/yr]


Prices chf functional unit

Prices [CHF/functional unit]


Ghg intensity kgco 2 functional unit

GHG intensity [kgCO2/functional unit]


Consumption characteristics

Consumption characteristics


Conclusion for mitigation policy

Conclusionformitigationpolicy

  • Few crucial consumption categories

    • car use, airplane, living and electricity. remaining variance can be explained by goods and food.

  • No absolute indicators for low GHG footprint

  • Consider total GHG emissions of households

  • Promote expenditure on quality and leisure


Conclusions for research on impact of quality

Conclusionsforresearch on impactofquality

We found that “green” consumer opt for higher quality.

  • But: higher quality goods might also lead to higher impact

    • Use of more exclusive materials, processing, less economy of scales

  • Also the opposite can be true

    • Organic food, longer life time, regional production (transport, energy mix, environmental standards)


Thank you for questions and comments bastien girod@env ethz ch

Thank you for questions and [email protected]


What is the potential of changing consumption1

Whatisthe potential ofchangingconsumption?

  • Best-practice-consumption: Emitters withlowest GHG emissions

  • Worst-practice-consumption: Emitters withhighest GHG emissions

  • Considerationofhouseholdtypesandincome

  • Advantage:

    • Noassumption on whatwouldbepossible

    • Consistentconsumptionpattern (reboundincluded)


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