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Case study on the carbon consumption of two metropolitan cities

Content Provider	Springer Nature Link
Author	Heinen, Jukka Junnila, Seppo
Copyright Year	2011
Abstract	The cities merit special attention in global warming since they produce up to 80% of the global greenhouse gas emissions. Even though this has been widely acknowledged, only few papers exist that have studied cities holistically from a demand, i.e., consumption, perspective. The study presents a detailed analysis of the carbon footprint of two metropolitan cities from a consumption perspective. With the analysis of consumer carbon footprints (carbon consumption), the distribution of emissions in the key source categories is presented and compared.The study utilizes Finnish consumer survey data by cities, regional emission data for key processes, and general emission data to produce a hybrid LCA model for a holistic assessment of city-level greenhouse gas emissions from the consumption perspective.The study results showed the carbon consumption to be 13.2 t CO2e per person in Helsinki with a 17,400 € annual consumption expenditure and 10.3 t CO2e per person in Porvoo with a 15,900 € annual consumption expenditure, respectively. The dominant carbon sources for metropolitan living are heat and electricity, building and property, private driving, and services. Within the cities, some significant differences were found. The carbon emissions from energy consumption are 4.5 t CO2e for an average consumer in Helsinki, whereas an average consumer in Porvoo only causes 2.0 t CO2e due to the cleaner energy production in Porvoo. On the other hand, private driving causes 2.0 t CO2e in Porvoo, but only 1.3 t in Helsinki. The overall trip generation in Helsinki is only half of that in Porvoo, and also, the usage of public transport is at a substantially higher level in Helsinki. The current results contradict interestingly some earlier studies in finding that the theoretical carbon-reducing influence of city density is overridden with other factors, such as the type of energy production, energy efficiency of the housing stock, and increased use of services. In our study, Helsinki represents a metropolitan area with a denser structure and a more efficient public transport system, but still consuming around 25% more carbon emissions than the other city in the metropolitan area, Porvoo. The sensitivity analysis showed that even with the normalization of the key parameters between the two cities, the main finding still holds.The evaluation of the carbon footprint of cities from the consumption perspective, instead of a more traditional production perspective, seems to offer an interesting new insight into the carbon footprints of the cities. It identifies similar key sources of carbon as production-oriented studies but further emphasizes the significance of the utilized services in the carbon footprint evaluations. In the future, the carbon footprint of services, especially in the service-intensive economies and cities that tend to outsource their manufacturing and carbon emissions, should be further examined since they cause an ever increasing proportion of the carbon consumption of consumers.
Starting Page	569
Ending Page	579
Page Count	11
File Format	PDF
ISSN	09483349
Journal	The International Journal of Life Cycle Assessment
Volume Number	16
Issue Number	6
e-ISSN	16147502
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-05-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate change mitigation Carbon footprint Consumption Green cities Hybrid LCA Urban structures Environment Environmental Economics
Content Type	Text
Resource Type	Article
Subject	Environmental Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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