- Conference Poster
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Zernez, a municipality with 1003 inhabitants in the Swiss Alps, has recently initiated a collaboration with ETH Zurich to identify ways to reduce its greenhouse gas (GHG) emissions. The present study aimed thus at determining the current carbon footprint of Zernez so as to identify the most relevant sectors and reduction potentials regarding GHG emissions. For this purpose, material and energy flows were assessed. The main data source was a database established during the project which contains comprehensive information about energy consumption at household level and specific data for all buildings in the municipality. Additionally, this dataset was amended by means of interviews, statistics of federal or cantonal offices, federal surveys, traffic censuses, literature values and life cycle inventory databases. The CO2-balance was then set up by combining energy and material flow analyses with methods of life cycle assessment. Special attention was paid to the consistent definition of system boundaries, adopting two perspectives: the consumption and the production perspective. The former concentrates on the impacts caused by the domestic final demand and includes therefore imported upstream emissions, whereas the latter quantifies the direct emissions within the geographical boundaries of the municipality. The production perspective allows identifying the most relevant direct emitters, while the consumption perspective uncovers the most important consumption areas by taking into account all consequences of consumer demand. Even though the result of the consumption perspective with total GHG emissions of 10.7 t CO2-eq/(cap yr) is very close to the production perspective with 10.9 t CO2-eq/(cap yr), these two viewpoints are fundamentally different. The production perspective revealed that 70% of the direct emissions in Zernez are caused by agricultural activities, in particular live-stock farming. From a consumption-oriented point of view, however, mobility, housing and nutrition are the most important areas causing more than 50% of the consumption induced emissions. Compared with the national average of 12.8 t CO2-eq/(cap yr) for the consumption perspective, the inhabitants of Zernez entail slightly lower GHG emissions. For example, lower emissions incur in the area of housing due to a large share of buildings heated by wood and by a low-carbon electricity mix. Based on this study, the municipality of Zernez is currently developing an action plan to reduce GHG emissions and increase the shares of renewable energy sources in the future. Show more
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Organisational unit03732 - Hellweg, Stefanie / Hellweg, Stefanie
NotesPoster presented on 9 July 2015.
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