Total radioactivity from cosmic rays, natural radioactive materials, and other radiation that is present in a specific area.
Total radioactivity that may be in a particular area from cosmic rays, natural materials and other radiation sources.
High-energy radiation that comes from natural sources.
The emanation of radiation in the natural surroundings of human beings encompasses various sources, including cosmic rays, naturally occurring radioactive elements present in the Earth, and radiation originating from within the human body itself.
Trace amounts of inherent radiation are emitted by various sources, including rocks and soil.