This paper explores connections between district-level environmental characteristics and voting behavior in the U.S. House of Representatives.  Specifically, it asks (a) does the profile of a given district’s major emissions sources correlate with representatives’ roll call voting on bills related to natural resource management, energy policy and the environment; (b) do representatives “vote their constituency” in terms of local vulnerability to pollution hazards; and (c) is the spatial clustering of civic centers within and beyond zones of apparent environmental threat associated with more pro-environmental voting?  Through original use of GIS, the work breaks new ground in exploring linkages between environmental justice, collective action and the built environment as they impact the formation of environmental policy, with novel findings for the 111^th and 112^th Congress. The finding support the argument that communities whose vulnerable civic centers are clustered in space enjoy increased environmental protection from their elected lawmakers.