Limestone which is most of the substance that makes up concrete, is "the most abundant mineral on earth."-Concrete Network. Concrete serves as an eco-steward due to its inherent quality of the ability to retain heat, therefore it is extremely energy efficient. From cladding on the exterior of buildings to roofs, floors and walls, concrete provides a great thermal barrier. As for durability, concrete doesn't rust, rot or burn!- Concrete Network. Waste management is easy when producing concrete - just make as much as you need for the project. It can be reused in the building of roads and pavements. Concrete is a sustainable building material. - Elizabeth E.