Szukana fraza: [Abstract = "Carbon accounting has become a valuable tool for expressing the fossil energy demand of products, organizational entities, or entire countries. About a decade ago, cities also began accounting their carbon emissions. The first major city to do so was London in 2009, stating a carbon footprint of 4.84 tCO2eq\/\(Lear\*capita\) for 2008. Nowadays, multiple rankings compare the carbon emissions of cities."]

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