Radiation, both natural background and man-made, forms a part of our environment which must be considered as both a benefit and a risk. In order to judge radiation a number of things must be taken into account, such as:
1. The radiation dose When a situation occurs with radioactive pollution, it is important to get accurate information about the radiation doses that are involved. It would be a waste of resources to immediately implement countermeasures if the doses involved are smaller than the variations in natural background radiation.