In the midst of the global climate crisis, there is a lot of talk about clean and renewable energy sources—the main issue: sustainable growth. Wind, solar, and hydro are popular possibilities, but some believe nuclear energy can satisfy the needs of the present and protect the future. But many environmentalists are concerned about the possible consequences of nuclear mishaps, asking whether it can ever be clean and sustainable. This article explores the key characteristics of nuclear that will determine whether it has a rightful place in the sustainability movement.