A nuclear bomb is a powerful weapon that releases energy through nuclear reactions, either fission or fusion. In fission bombs, heavy atomic nuclei, like those of uranium or plutonium, are split apart, releasing a massive amount of energy. Fusion bombs, also known as hydrogen bombs, combine light atomic nuclei, such as hydrogen, to create an even more powerful explosion. Nuclear bombs have devastating effects, including intense heat, shockwaves, and radiation, which can cause widespread destruction and long-term health issues. The use of nuclear weapons is heavily regulated by international treaties, such as the Nuclear Non-Proliferation Treaty, to prevent their spread and promote disarmament.