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CDP Cities 2011


The City of Seoul has let Lloyd’s Register Quality Assurance (LRQA)


verify “the GHG emissions data for the calendar years from 1990 to 2008” using the ISO 14064-3 standard.


total emissions (in Seoul


“The City of Melbourne incorporates all emissions from the geopolitical boundary plus emissions from half of all external transport trips originating or terminating in the muni- cipality.”


Melbourne million metric tons CO2 -e) ....% Number of responding cities (42)


Between responding C40 cities, there is also great variation between the years chosen for reporting through CDP on community GHG emissions. Few cities (5 out of 28 respondents) report community emissions data for 2009 and 2010. The majority of C40 cities report emissions inventories for years ranging from 2000 to 2008, with 2008 being the most common accounting year disclosed to CDP.


Despite these challenges, there are some commonalities in the ways cities measure emissions. For example, most cities identified their “geopolitical boundary” as the reference for their community emissions inventory. While the size and breadth of this boundary varies from city to city, the fact that most cities use a similar metric is an important point of concordance.


Neighborhood-level data is not widespread


CDP asked cities to define the spatial scale at which they collect data.


23 cities collect community emissions data at the city level. A small number of cities take a more granular approach and collect emissions at the street level or by postcode. More granular data is more challenging to collect and track, and may not necessarily provide greater insight into emissions drivers. But for some cities, having this level of understanding can enable them to better tailor policy.


Few cities have their emissions data externally verified 24 percent (7) of C40 cities reporting city-wide emissions have their inventories externally verified or audited. Although verification is still at an early stage, based on number of respondents, the ability to call on verified data may provide government organizations with a powerful tool in their efforts to influence policies or regulations at other levels of government or to communicate with other community stakeholders, or even to qualify for international funding.


Fig. 24: Breakdown of community emissions, by scope Total GHG emissions Scope 1 67% 33% 609.5 160.1 Scope 2 31% 101.8


22 © 2011 Carbon Disclosure Project


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