Zbigniew Jaworowski, Physician, Ph.D. and D.Sc. in Natural Sciences - About 2.3 billion years ago, the advent of an oxidative atmosphere stimulated the surviving organisms to develop efficient defences against the enormous flux of Reactive Oxygen Species (ROS) produced by metabolic processes. These powerful ancient defence mechanisms also protect against the DNA damage caused by low levels of ionising radiation, which is one of the smallest risks in the environment. The Linear No Threshold (LNT) model of the radiation effects appears inappropriate for the current needs.
