It’s too bad you can’t actually use the most ordinary common garden variety C-12 for a nuclear fuel by energetically agitating it by some other as yet undiscovered means. Now that would really be an incredible breakthrough. So far, ordinary carbon can’t do much. If you try to bombard it with neutrons to try and make carbon fission like uranium, it will absorb more neutrons than new ones released, causing any potential chain reaction to wind down to a stop. Some physicists have likened it to trying to burn wet wood. If only……if only……if only a new practical way to energetically agitate and destabilize the C-12 nucleus could be discovered. If not, then focus fusion by absorption of a hydrogen proton is still the only way.