Human radiation gain from the environment a little more so it does not have any effect on the body. But if the body is very high level radiation doses. Unusual symptoms, it may cause bodily harm to life.
Radiation that humans receive from the environment is very small, so it has no effect on the body. But if the body has a very high dose. It may be physical symptoms and life-threatening.
Human radiation received from the environment has very little traffic, so no any effect on the body. But if the body has a very high dose Symptoms may cause the body to life-threatening.