Recent interest in Fusion reactors to replace fossil fuel and fission generation plants has given renewed interest in fusion reactor research. Three major fusion reactor models have been proposed. 1. Tokamak and Stellarators 2. Pulsed Fusion (Z pinch and laser igniton) 3. Polywell reactor (Robert Bussard) Polywell reactors may generate more electricity than they consume. Fusion may solve global warming, energy crisis, and space travel in the next 20 years. Place the fusion star in each reactor type. Travel to space using fusion.