Nuclear Fusion:
Launch a proton and neutron at very high speeds against each other, it will create a chain reaction of hydrogen and (forgot this gas particle). It will also create less but still hot amounts of heat. By "less" I mean it will create less heat than nuclear Fission, the more complicated and is used in nukes. Fusion is mainly used in nuclear reactors for electricity. If a turbine fails, cooling water stops flowing. If the water stops flowing, it will begin to overheat and then explode into fire (not your nuclear mushroom). The explosion will release a ton of rads of radiation. Look at Chernobyl Nuclear Powerplant and its surrounding region. Chernobyl City, Kiev, ect. Its death toll is over 9000 (no reference intended) humans.
Already I can tell you know absolutely nothing about nuclear fusion because you simply reworded the first sentence from the wiki article, with also pretending to forget what the second gas particle is (which is helium.)
This one actually makes me laugh, when you state the obvious, but thin out the material and just let it pan out into a long paragraph doesn't make you seem smart. And what's wit the turbine stuff? That's not exactly relevant and talking about common knowledge about Chernobyl doesn't make you remotely smart.
seriously are you autistic