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Global typology of urban energy use and potentials for an urbanization mitigation wedge

Proceedings of the National Academy of Sciences - PNAS, 2015-05, Vol.112 (20), p.6283-6288 [Peer Reviewed Journal]

Volumes 1–89 and 106–112, copyright as a collective work only; author(s) retains copyright to individual articles ;Copyright National Academy of Sciences May 19, 2015 ;ISSN: 0027-8424 ;EISSN: 1091-6490 ;DOI: 10.1073/pnas.1315545112 ;PMID: 25583508

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  • Title:
    Global typology of urban energy use and potentials for an urbanization mitigation wedge
  • Author: Creutzig, Felix ; Baiocchi, Giovanni ; Bierkandt, Robert ; Pichler, Peter-Paul ; Seto, Karen C.
  • Subjects: Climate change ; Emissions control ; Energy consumption ; Energy policy ; Physical Sciences ; Social Sciences ; SPECIAL FEATURE ; Transportation planning ; Urban planning ; Urbanization
  • Is Part Of: Proceedings of the National Academy of Sciences - PNAS, 2015-05, Vol.112 (20), p.6283-6288
  • Description: Significance Many case studies of specific cities have investigated factors that contribute to urban energy use and greenhouse-gas emissions. The analysis in this study is based on data from 274 cities and three global datasets and provides a typology of urban attributes of energy use. The results highlight that appropriate policies addressing urban climate change mitigation differ with type of city. A global urbanization wedge, corresponding in particular to energy-efficient urbanization in Asia, might reduce urban energy use by more than 25%, compared with a business-as-usual scenario. The aggregate potential for urban mitigation of global climate change is insufficiently understood. Our analysis, using a dataset of 274 cities representing all city sizes and regions worldwide, demonstrates that economic activity, transport costs, geographic factors, and urban form explain 37% of urban direct energy use and 88% of urban transport energy use. If current trends in urban expansion continue, urban energy use will increase more than threefold, from 240 EJ in 2005 to 730 EJ in 2050. Our model shows that urban planning and transport policies can limit the future increase in urban energy use to 540 EJ in 2050 and contribute to mitigating climate change. However, effective policies for reducing urban greenhouse gas emissions differ with city type. The results show that, for affluent and mature cities, higher gasoline prices combined with compact urban form can result in savings in both residential and transport energy use. In contrast, for developing-country cities with emerging or nascent infrastructures, compact urban form, and transport planning can encourage higher population densities and subsequently avoid lock-in of high carbon emission patterns for travel. The results underscore a significant potential urbanization wedge for reducing energy use in rapidly urbanizing Asia, Africa, and the Middle East.
  • Publisher: United States: National Academy of Sciences
  • Language: English
  • Identifier: ISSN: 0027-8424
    EISSN: 1091-6490
    DOI: 10.1073/pnas.1315545112
    PMID: 25583508
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    PubMed Central
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