Black carbon, a component of soot and particulate matter, competes closely with methane as the largest anthropogenic contributor to global warming after carbon dioxide. Regulation of black carbon has been identified as an affordable, politically feasible, fast-action means to mitigate the warming temperatures caused by climate change. With an emphasis on domestic mitigation, this Article examines how emissions are controlled under the CAA and what EPA, states, and municipalities can do to mitigate black carbon emissions further.