Simplification of the Environmental Life Style Analysis (ELSA) model

Accurately determining the environmental impacts of specific lifestyles is a critical part of moving to reduce those impacts. However, this process is often complicated and tedious. This study strives to simplify that process by improving upon the Environmental Life Style Analysis (ELSA) model put forth by Gutowski et al. To accomplish this goal, data on the expenditures, divided between eight categories such as transportation or taxes/government services, of 24 different life styles was collected and analyzed. First, a quantity called the impact intensity, defined as the impact per dollar of expenditure, was calculated for each life style in each category. After being deflated to 1997 values, which is required by the ELSA model, these values were then averaged over each of the eight categories to correlate spending in a specific category to impact. This allowed the simplification of the model into a simple eight input version. When this model was tested using values of average expenditure for 1997, it was found to accurately calculate CO2 emissions. While the energy calculations were not particularly accurate, this is a significant step forwards. In addition, the model was able to calculate impacts for a very minimal life style, in this case a homeless man. Data pertaining to the homeless man's expenditures provided insight into the basic environmental impacts caused simply by surviving as a resident of the United States. Although more work needs to be done on this model, this study made strides forward and showed that there is significant potential for this model as a simple but accurate environmental impact calculator.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Mechanical Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2008

Author dc:creator

• Teixeira, Anthony D. (Anthony Daigo)

Advisor dc:contributor.advisor

• Timothy Gutowski.

• Mechanical Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/45306

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/45306