Concrete is a responsible choice for sustainable development. Its durability is a significant sustainable attribute because it will not rust, rot, or burn, requiring less energy and resources over time to repair or replace. Although Portland Cement (PC) is manufacturing is energy intensive, concrete is primarily (86% to 90%) made of sand and gravel, materials which have very low embodied energy and are usually available locally. Structures built with insulated concrete systems have optimal energy performance, due in part to negligible air infiltration and thermal mass. Additionally, concrete is a proven performer for disaster resistance, incurs little waste and can be readily recycled.