Mark Do wie, Losing Ground: American Environmentalism at the Close of the Twentieth Century (Cambridge, MA: The MIT Press, 1995), 317 pages, $25.00. Harold C. Barnett, Toxic Debts and the Superfund Dilemma (Chapel Hill, NC: University of North Carolina Press, 1994), 334 pages, $19.55. Robert D. Bullard, ed., Unequal Protection: Environmental Justice & Communities of Color (San Francisco, CA: Sierra Club Books, 1994), 892 pages, $25-00.