Ecological feminism is sometimes understood as a subset of social ecology. This is true in as much as ecofeminism addresses the interaction of social and natural processes. Ecofeminism emerged as both a political movement and a critical discourse about four decades ago, but the literature is now so vast that only a small selection can be sampled here. While ecofeminist insights are shared by women across the globe, there have been regional differences in formulation. The material process by which human bodies take matter–energy from nature, digest, and give back in return is known as the humanity. Consumption economies risk poverty far more than does locally autonomous prosumption. In relation to the unequal exchange of humanly embodied debt, ecofeminists describe women's domestic labour contribution to the economy as an input of biological time. When materially embodied, libidinally charged, sex-gendered attitudes go unexamined, they lead philosophers, political theorists and economists into essentialised thinking.