Mateo’s parents are thinking about investing money to help develop a new fusion power plant. Which issue is most important to consider before making the investment?

Fusion needs extremely high temperatures and pressures to make atomic nuclei combine, which takes a large amount of energy. Before investing, Mateo’s parents should consider whether the plant can produce more energy than it uses and whether the energy cost has been reduced. Fusion has been controlled in experiments, but it has not yet generated electricity commercially for decades; its fuels are not considered especially limited.

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