Fig. 2From: Two communities, one highway and the fight for clean air: the role of political history in shaping community engagement and environmental health research translationPercentile rankings for block groups in Somerville, MA & Boston, Chinatown compared to block groups in US for two demographic indicators (percent of population considered minority and percent of population considered low-income) [18] and an environmental indicator (proximity to traffic) [19]. data was obtained from US EPA’s EJSCREEN (https://www.epa.gov/ejscreen)Back to article page