The UPP states that the price of a natural resource should reflect the full range of costs involved in using it, including the costs of the external effects associated with exploiting, transforming, and using the resource, together with the cost of the future uses forgone. It follows that the price for the use of a resource should be the full long-run marginal social cost of using it, including the external costs associated with its development and any resultant pollution prevention and control activities.