Neutrinos are elementary particles emitted in nuclear reactions like fission, fusion and radioactive decay. The sun emits vast numbers of neutrinos which can pass through the earth with little or no interaction.
Category:
Radiation
Background radiation is a natural part of the environment. The largest source of background radiation exposure comes from the natural radioactivity in rocks and soil and the inhalation of naturally occurring radon that seeps from the ground into our buildings.