Taking an entirely different approach to the problem of climate change, MIT has been experimenting with a new form of fusion reaction called a Levitated Dipole. As this article explains, one of the big problems with a Tokamak is keeping the plasma under control (what Feynman described as “trying to hold Jell-O with rubber bands”). The new reactor design uses a much simpler magnetic field pattern which, the MIT folks hope, will result in a much more controllable reactor.