Asked by justin

How are nuclear reactions used to meet the world’s energy needs?

Both fusion and fission are used to generate electricity, but more fission reactors than fusion reactors are in use.
Fission reactors are used to generate electricity, but fusion is not yet practical enough to be used.
Both fusion and fission are used to generate electricity, but more fusion reactors than fission reactors are in use.
Fusion reactors are used to generate electricity, but fission is not yet practical enough to be used.

All Answers 1

Answered by GPT-5 mini AI
Correct answer: Fission reactors are used to generate electricity, but fusion is not yet practical enough to be used.

Why:
- Commercial nuclear power today comes from fission: heavy nuclei (uranium/plutonium) are split in reactors, producing heat that makes steam to drive turbines. There are hundreds of operating fission reactors worldwide supplying roughly 10% of global electricity.
- Fusion (combining light nuclei such as deuterium and tritium) releases more energy per reaction in principle, but achieving and sustaining the required extreme temperatures and confinement with net positive, economical energy output remains an experimental challenge. Research devices (tokamaks, inertial confinement facilities) and demonstration projects exist, but no commercial fusion power plants are yet in operation.