The user of land should not be allowed to acquire rights of indefinite duration for single payments. For efficiency, for adequate revenue and for justice, every user of land should be required to make an annual payment to the local government equal to the current rental value of the land that he or she prevents others from using.
Robert SolowThe world can, in effect, get along without natural resources, so exhaustion is just an event, not a catastrophe.
Robert Solow