the supply of an inexhaustible resource does not change over a long period of time
supply is resource. earth's_supply_of_wood is limited_resource. natural_resource is not resource. wood is not valuable_renewable_resource. resource is not inventiveness. inner_resources is not resource. supply is not resource. earth's_supply_of_wood is not limited_resource. ubiquitous_resource is not natural_resource. resource is not asset.