I occasionally write about fusion energy. Although this may be the holy-grail of sustainable energy production in the future, I still need to write about it in the future-tense. There are many variants of fusion energy being tested, but none of them have a clear path to an economically viable large-scale electricity generation facility.
Two of these flavors are being championed by National Labs in my hometown (Livermore, California): The National Ignition Facility (NIF) at Lawrence Livermore National Labs (LLNL) and MagLIF at Sandia National Labs (SNL) in collaboration with LLNL.