A number of genetic alterations have been linked to hazardous environmental exposures. Studies have further suggested that the effects of such changes may be passed on to future generations. While additional verificatory studies in the area of transgenerational epigenetics are required, LSI Faculty Director Gary Marchant and his colleagues investigate its potential social impact through theories of environmental justice. The article examines the feasibility and need for mandates distinguishing and protecting those most vulnerable, with a focus on future generations, from risky environmental exposures.