Don't forget https://en.wikipedia.org/wiki/Naturally_occurring_radioactive_material https://en.wikipedia.org/wiki/Naturally_occurring_radioactiv... considerab

Don't forget https://en.wikipedia.org/wiki/Naturally_occurring_radioactive_material https://en.wikipedia.org/wiki/Naturally_occurring_radioactiv... considerable amounts of low-level radiation is emitted by fossil fuel production and use as well as and construction materials.