Reinforced concrete will remain one of the basic structural materials in the decades ahead for three reasons: while supplies of some materials are decreasing, the components of reinforced concrete- cement, aggregates and steel- are plentiful. Even where local or regional shortages of good natural aggregates develop, the shortages could be eased by manufactured aggregates. When shortages occur in reinforcing steel and cement it is because of price conditions rather than exhaustion of raw materials. Reinforced concrete requires low energy input for its production as well as for its use; and the qualities that give reinforced concrete such great appeal today- strength, versatility, durability, fire resistance- will be in equally high demand in the extensive construction of the next 50 years. By the year 2000, the designer and builder will be able to control concrete quality much more closely through more uniform cement and improved methods. This will make it possible to exploit the potential of the material more fully and to assure specific qualities for a specific job. Some concretes may contain pulverized waste glass and rubber or aggregate made from incinerated waste materials, thus helping solve and environmental problem as well as a structural one. By the year 2000, a percentage of any construction budget will be allocated for esthetics. There will be a significant increase in the use of integrally colored concrete and an increased use of decorative finishes produced by advances in tooling, grinding, polishing, sandblasting, pressing, stamping and forming techniques to acquire different surface textures. Portable casting molds will become common for jobsite precasting and replace the extensive rebuilding of forms for each casting. Some formwork will be eliminated by the development of concrete that can be placed and worked into a vertical wall without the need of form support.