Radiation in Everyday Life: Bananas to Granite

Radiation isn’t just from reactors—it’s a natural part of our daily environment.
Bananas contain potassium-40, a naturally radioactive isotope.
Granite countertops emit low levels of radiation from uranium and thorium.
Cosmic rays from space constantly shower Earth with high-energy particles.
Airline crews receive higher radiation doses due to flying at high altitudes.
Smoke detectors use americium-241, a tiny radioactive source for safety.
Brick, stone, and concrete buildings naturally release small amounts of radon gas.
Our own bodies are slightly radioactive thanks to carbon-14 and potassium-40.
Background radiation levels vary by location but are usually harmless.
Everyday exposure is far below dangerous levels and has always been part of life on Earth.