The declaration of the Factor Ten Club states that within one generation, nations can achieve a ten-fold increase in resource efficiency through 90 percent reduction in the use of energy and materials. Obviously, large sav- ings in materials can result in the future if we begin to make products that would last much longer. For example, the resource productivity of concrete indus- try can leap by a factor of five if most of the structures built today would endure for 250 years instead of the conventional 50.