This article reviews the already existing and possible world uranium resources and their value from the economic point of view. At the recent market prices it is very likely that only 20% or less of the US $80/kg U reported in this article could be produced economically. Even if no nuclear power plants are ordered, uranium production will increase to meet the demands of those now being built and to maintain inventories of fuels at operating plants. Although experts and observers do not agree on the time required for a turn-around in demand, they do agree that preparation for that time must be made now and that the present market prices do not provide adequate incentive for producers to make those preparations