This transdisciplinary inquiry presents a new way of thinking about sustainability and technology that takes us beyond the familiar preoccupation with ecoefficiency, and toward the contested moral question of what most nourishes our ability to care for our world. In contrast to the technocratic aim of controlling a perilous future, the author proposes that we develop the practical craft of sustenance. Beginning with debates in environmental policy, he draws upon recent philosophical interest in ecology, technology, and moral experience to argue that the challenge of sustainability is that of undermining those traditions that present technology as somehow external to our inherent moral ambiguity. This discussion responds to the work of Langdon Winner, Albert Borgmann, Charles Taylor, Martin Heidegger, David Abram, and others.