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Studies of self-pollution in diesel school buses: methodological issues
Jonathan Borak1, Greg Sirianni
1Yale University - Epidemiology & Public Health and Medicine, New Haven, Connecticut, USA. jborak@jborak.com
Journal of Occupational and Environmental Hygiene
|July 10, 2007
Summary
Diesel school bus cabin pollution may be reduced by emission controls. Studies suggest current technologies can significantly decrease self-pollution from bus exhaust, improving air quality for students.
Area of Science:
- Environmental Science
- Public Health
- Mechanical Engineering
Background:
- Diesel school bus exhaust emissions in cabins raise health concerns.
- Distinguishing self-pollution from external sources is critical for policy and engineering.
Purpose of the Study:
- To evaluate studies measuring diesel particulate matter in school bus cabins.
- To assess the effectiveness of emission control technologies in reducing self-pollution.
Main Methods:
- Systematic review of 19 reports from 11 studies involving 58 school buses.
- Evaluation of study designs, data quality, and quantification of self-pollution.
- Analysis of studies using experimental designs and intentional tracers.
Main Results:
- Most studies lacked rigorous experimental design for quantifying self-pollution.
- Evidence suggests available emission control technologies can significantly reduce particulate self-pollution.
- Definitive data on the complete elimination of self-pollution are still limited.
Conclusions:
- Current emission control technologies show promise in mitigating diesel school bus cabin pollution.
- Further research with robust experimental designs is needed to confirm the efficacy of control measures.
- Reducing self-pollution is achievable and essential for student health.
