Final answer:
The incorrect statement about nuclear fusion is that current nuclear power plants generate electricity with fusion; in reality, they use nuclear fission. Fusion requires conditions like those in stars, where it occurs naturally and powers them.
Step-by-step explanation:
The statement that is NOT true about nuclear fusion is: 'Current nuclear power plants make electricity without the help of fusion.'
Nuclear fission is the process used in current nuclear power plants to generate electricity, not fusion. Fusion, unlike fission, requires very high pressures and temperatures, similar to conditions found in the Sun and stars, where nuclear fusion is naturally occurring. Fusion reactions are what power stars, including our Sun, and result in the combination of light atomic nuclei such as hydrogen to form heavier elements like helium, releasing a significant amount of energy in the process. The fusion-based bombs referred to as H-bombs, where 'H' stands for hydrogen, are the result of uncontrolled fusion, powered initially by a fission bomb to achieve the necessary conditions.