High-energy electromagnetic radiation released during the de-excitation of the atomic nucleus is known as gamma radiation. A wide range of phenomena are included in the category of electromagnetic radiation, including light, radio, television, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma radiation. Every one of these radiations travels through vacuum at the speed of light. They are known as wave phenomena, which are oscillations in the electric and magnetic fields that are comparable to mechanical oscillations like sound or water waves. Their sole difference from one another is the oscillation frequency. Both in natural and man-made environments, gamma radiation, is a type of electromagnetic radiation with high energy and short wavelengths that comes from a variety of sources. This study examines the various sources of gamma radiation, illuminating the radiation’s dual character as a byproduct of both human activity and natural processes. Radionuclides found in the Earth’s crust, such as uranium, thorium, and potassium-40, are the main sources of gamma radiation in the natural world. As a consequence of these elements’ radioactive decay, gamma rays are produced, adding to the ambient background radiation. Furthermore, the Earth’s atmosphere reacts with cosmic rays to create secondary gamma radiation, which raises the natural background levels even more. Human activity across multiple industries is the cause of anthropogenic radiation. The main sources of anthropogenic gamma radiation are nuclear power plants, radiation treatment centres for medical purposes, and industrial uses of radioactive materials. Concerns for the environment and human health are raised by unintentional releases, nuclear mishaps, and incorrect radioactive waste disposal. Assessing radiation exposure, putting safety precautions in place, and reducing possible dangers from both natural and man-made sources all depend on having a thorough understanding of the various sources of gamma radiation. With a focus on the necessity of responsible behaviour and well-balanced regulations to protect the environment and human health, this study attempts to present a thorough analysis of these sources.