This study develops a consumption-based greenhouse gas inventory of all San Francisco Bay Area census block groups, cities and counties. It is the first study to explore household carbon footprints at such fine geospatial resolution for any region. The methodology incorporates local consumption and emissions data wherever possible. In other cases, consumption is approximated using econometric analysis of national and statewide transportation and household consumption survey responses by S.F. Bay Area residents. The consumption-based method results in about 35% higher GHG emissions than the traditional territorial approach for the region, largely due to higher emissions from imported food and goods. Transportation is the largest source of emissions (33%), followed by food (19%), goods (18%), services (18%) heating fuels (5%), home construction (3%), electricity (2%) and 1% waste.
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