Skip to main content


Fig. 2 | Environmental Health

Fig. 2

From: A risk-based model to assess environmental justice and coronary heart disease burden from traffic-related air pollutants

Fig. 2

Correlation of BC and NO2 levels within Allegheny County census tracts. Exposure estimates for each pollutant were obtained for each census tract as described from the LUR models (Fig. 1). Each point represents a single tract plotted in terms of its modeled BC (μg/m3) and NO2 (ppb) value. Linear regression of the entire dataset indicates a significant positive correlation between each pollutant; however, considerable variability exists around the linear relationship (r2 = 0.3178)

Back to article page