| environ. | final storage A system where inert materials, which are not to be mobilized by natural processes even for long time periods, are confined by three barriers: the natural impermeable surroundings, an artificial barrier (such as liner) which can be controlled and, most important, the inert material itself. The concept of final storage includes the possibility to mine the materials in the future if such materials are sufficiently "clean" (mono-landfills) and if it becomes economic to mine such ores | stockage final |