The last one is called "radiation hormesis", the opposing theory in which there is no safe level of ionizing radiation is "linear-no-threshold" (focusing only o

The last one is called "radiation hormesis", the opposing theory in which there is no safe level of ionizing radiation is "linear-no-threshold" (focusing only on the "no threshold" part). The middle ground is a threshold model in which low levels are hypothesized to do nothing for or against one's health. - https://en.wikipedia.org/wiki/Radiation_hormesis https://en.wikipedia.org/wiki/Radiation_hormesis - https://en.wikipedia.org/wiki/Linear_no-threshold_model https://en.wikipedia.org/wiki/Linear_no-threshold_model