sentence: Nuclear fusion is a very powerful source of energy.
sentences_after: It relies on forcing atoms together to make helium and energy, exactly as happens in a star like the Sun, or in a hydrogen bomb. This needs a large amount of energy to get started, and is not easy to do yet. A big advantage over nuclear fission, which is used in nuclear power stations, is that no waste is produced, and no toxic fuel like uranium is needed.
concept_name: nuclear fusion
headings: Hydrogen Uses of Hydrogen Hydrogen as fuel (fusion)
categories: Nonmetals