This article proposes and evaluates four hypotheses about US pollution and environmental policy over the last half … century. First, air and water pollution have declined substantially, although greenhouse gas emissions have not. Second …, environmental policy explains a large share of these trends. Third, much of the regulation of air and drinking water pollution has …

Do US air pollution offset markets disproportionately relocate pollution to or from low-income or minority communities … plants. We find little association of offset prices or offset-induced movements in pollution with the share of a community …

Between 1990 and 2008, air pollution emissions from U.S. manufacturing fell by 60 percent despite a substantial … suggest that the implicit pollution tax that manufacturers face doubled between 1990 and 2008. These changes in environmental …