IMPACT OF RADIATION ON THE ENVIRONMENT

摘要

Studies led by the IPSN have shown that, for both populations and the environ- ment, global exposure to natural radioactivity is more important than exposure to artificial radioactivity. These exposures are important for plant and animal species in particular conditions, but the flora and the fauna generally have a strong radi-oresistance. Studies in radioecology provide material for reflection with respect to radiation protection. They aim especially at explanation of fundamental processes of transfer in the environment at both macroscopic and microscopic levels. The improvements in knowledge about deposition from the troposphere and resuspension of aerosols from soil, passage of aerosols from the stratosphere to the troposphere, water dispersion in the English Channel and the North Sea, water-sediment transfer on the sea floor, and fixing mechanisms of elements in mosses are typical examples of results from the rigorous observation of the radioactivity in the environment.