All around and in us nature turns water into helium, oxygen, heat and gamma wave radiation. Does molecular nuclear fusion from the turbulent flow of high pressure water or steam.
Lightning bolts are the most obvious place. We get our gamma wave radiation, heat, light, sound, helium and we form ozone. The largest source of MNF on earth is the deep seas. Without it, there would be no life on earth.
Green plants in the light years biological catalysts and fluid turbulence around the photoblasts, to do photosynthesis. Guess what. We form helium, oxygen, gamma wave radiation and heat. The oxygen forms ozone –as ever.
Growing bacteria do it. As do animal blood systems. Most useful way to man, is via the steam cycle. All man's chemical engines do it. No carbon dioxide, and no toxic fission waste. No waste at all actually. Just normal reactive helium and the oxygen you need to breathe in.
Nuclear fission from uranium pollutes, is toxic and great waste which is toxic for hundreds of thousands of years: it is toxic death.