fusion reactions

Fusion reactions occur when two light atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This is the same process that powers the sun and stars, where hydrogen nuclei fuse to create helium and release energy that produces light and heat. Achieving fusion on Earth involves heating gases to extremely high temperatures and pressures, allowing nuclei to overcome their natural electrical repulsion and fuse. Fusion offers a potential source of abundant, clean energy because it produces minimal waste and uses fuels that are plentiful. Controlled fusion remains a key scientific goal for sustainable power.