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CDP Cities 2011


“The City of Seattle measures the following Scope 3 emissions: employee commute, municipal solid waste, and employee air travel.”


Seattle


Fig.13: Breakdown of city government operations emissions, by scope Total GHG emissions Scope 1 total emissions (in million metric tons CO2-e)


45% 26% 27.3


2.72 ....% Number of responding cities (42)


Assessment of Scope 3 emissions is still uncommon 4 cities provide separate figures for Scope 3 emissions, suggesting that a small number of C40 cities believe that their indirect emissions are important to measure and track. Scope 3 emissions are indirect emissions that lie under the influence of the city government, excluding electricity and energy consumption. They might include, for example, contracted services (like school buses), business travel (like air travel/taxis) and paper use. Toronto, Sydney, Seattle, and New York in particular provide clear information about how they calculate Scope 3 emissions. In the private sector, research has demonstrated that on average more than 75 percent of an industry sector’s carbon footprint is attributable to Scope 3 sources2


.


2 Categorization of Scope 3 Emissions for Streamlined Enterprise Carbon Footprinting


Huang, Y.A., C.L. Weber and H.S. Matthews (2009).


Natural gas is the most common fuel type


The CDP Cities questionnaire also offered C40 cities the chance to report on the types and quantities of fuel that they consume. Natural gas (often associated with heating of buildings) is the most commonly reported and represents 91 percent of total reported fuel consumption. The total amount of fuel consumption reported by the 15 cities answering this question was approximately 800 million GJ, which is almost as much as the total energy consumption of Denmark3


the largest consumer of fuel is the Moscow city government, followed by Buenos Aires and New York, although consumption figures relate to the scope of services provided by each city and are therefore difficult to compare.


3 U.S. Energy Information Administration. Total Primary Energy Consumption (2008).


Scope 2 Scope 3 24% 10% 1.56 0.02


.As reported,


16 © 2011 Carbon Disclosure Project


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