The second possibility, fusing with itself ( + ), requires even higher temperatures (since now both reactants have a +2 charge), and thus is even more difficult than the D- reaction. However, it does offer a possible reaction that produces no neutrons; the charged protons produced can be contained using electric and magnetic fields, which in turn results in direct electricity generation. + fusion is feasible as demonstrated in the laboratory and has immense advantages, but commercial viability is many years in the future.