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Nuclear fusion reactors do not exist yet as we don't know how to build them. All nuclear reactors are nuclear fission reactors.
0% No country gets any of its energy from fusion as nobody has figured out how to build a controlled fusion reactor.
The expectation is that fusion reactors will provide large amounts of energy, and that they will be relatively environmentally-friendly.
Not yet, but people are trying to build a fusion reactor.
No. "Reactors" contain fission reactions. No useful way of containing fusionon an industrial scale outside the laboratory has been developed yet.Edit: Tomak fusion reactors currently produce 10 times the energy that is put into them. The historical increase into the gain of fusion reactors has bettered the increase of capacity of DRAMs. The only reason that that it "isn't out of the laboratory" is because when you build a fusion reactor, it is usually called a laboratory.
Ocean Water
Well, fusion bombs are, but fusion reactors should not be (if we can build them).
Sure, you can get a tan from it, since the Sun is a big fusion power reactor. In the near future we will be able to build fusion reactors here on Earth. Google "ITER" to see how it's going. In the meantime I suppose you can say the fusion power is actually solar energy.
Primarily Concrete and electoral votes
maybe
You have to build a nuclear reactor which is an assembly of nuclear fuel and a moderator, which enables a chain fission reaction to start and continue, which releases thermal energy.
The nuclear reactor was invented in 1933 by Leo Szilard, in London, but he did not try to build one. The first functioning nuclear reactor, CP-1, was designed and built in 1942 by Enrico Fermi, in Chicago, IL.