A part of the environment is caused by ourselves, and the amount by which we control access to the natural resources, such as useful sites of land. When a tax is placed on the potential productivity or actual productivity of such a site, the effect will be to ensure that it is either properly used or sold to someone else who will. The claim for this taxation of land values will cause entrepreneurs to more easily find sites that before were both too costly and were held of use (for speculation in their rising values). With more sites available at lower prices, this is when there is a greater supply, and the price is reduced. Labour can be better used with poorer unemployed persons now being able to find work and a more suitable place to live.