Britain’s supremacy in the nineteenth century depended in large part on its vast deposits of coal. This coal not only powered steam engines in factories, ships, and railway locomotives but also warmed homes and cooked food. As coal consumption skyrocketed, the air in Britain’s cities and towns became filled with ever-greater and denser clouds of smoke. In this far-reaching study, Peter Thorsheim explains that, for much of the nineteenth century, few people in Britain even considered coal smoke to be pollution. To them, pollution meant miasma: invisible gases generated by decomposing plant and animal matter. Far from viewing coal smoke as pollution, most people considered smoke to be a valuable disinfectant, for its carbon and sulfur were thought capable of rendering miasma harmless. Inventing Pollution examines the radically new understanding of pollution that emerged in the late nineteenth century, one that centered not on organic decay but on coal combustion. This change, as Peter Thorsheim argues, gave birth to the smoke-abatement movement and to new ways of thinking about the relationships among humanity, technology, and the environment.