A third kind of ecofeminist ethic is environmental justice-focused ethics. This kind of ethic appeals to (mainly) distributive models of social justice to show why, for example, the disproportionate distribution of environmental harms to women and children (particularly poor women of color who are single heads of households with children under the age of eighteen) constitutes a social and environmental injustice. They focus on ways these harms are caused by such environmental problems as unsanitary water, the location of hazard waste sites, and environmental toxins (Gaard and Gruen 2005; Warren 2000). 