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Smog and socioeconomics: an evaluation of equity in traffic-related air pollution generation and exposure

Timothy Sider, Marianne Hatzopoulou, Naveen Eluru, Gabriel Goulet-Langlois and Kevin Manaugh

Environment and Planning B, 2015, vol. 42, issue 5, 870-887

Abstract: How traffic-related air pollution generation and exposure is distributed among different population groups is an important environmental justice concern. From a social equity perspective, many questions arise at the metropolitan scale. Do socially disadvantaged communities have higher exposure levels to traffic-related air pollution? Do discrepancies exist wherein neighborhoods are not exposed to levels of pollution similar to those they themselves generate? And, is there a relationship between this discrepancy and social disadvantage? These questions are examined for the Montreal Metropolitan Region through the development of an integrated transport and emissions model. Two measures of traffic-related air pollution are estimated at the traffic analysis zone level: (1) generation (average emissions per household), and (2) exposure (average residential zone concentration). A social disadvantage index is also calculated that incorporates elements of social and material deprivation. Three levels of inequity exist regarding emissions, exposure, and socioeconomics. Social disadvantage was found to have a positive relationship with exposure, meaning that the most socially disadvantaged communities tend to experience the highest levels of traffic-related air pollution. Spatial discrepancies in emission generation versus emission exposure are also present for most of the metropolitan region. Furthermore, the communities that face a double burden of greater disadvantage and higher exposure also tend to create the lowest quantities of pollution.

Keywords: emission modeling; air pollution exposure; social disadvantage; environmental justice; polluter-pays principle (PPP) (search for similar items in EconPapers)
Date: 2015
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Handle: RePEc:sae:envirb:v:42:y:2015:i:5:p:870-887