Today, we obsess over our “carbon footprints,” the world’s finite supply of clean fresh water, and meeting the other needs of the world’s growing population. Yet, the technological solution to so many of these problems has been right under our noses since the early 1950s. Why has it taken so long to evolve from scientific theory to commercial reality? Where does the technology stand right now? What barriers still remain? When, if ever, will nuclear fusion become a commercial reality? We’ll give you a state-of-the-art overview.