Concrete is Earth’s second-most-used material behind water, creating about four times more CO2 emissions than planes. Some companies are trying to revolutionize the industry.

such as granite cobblestones and building stone, which can be used in landscaping, garden paths, and restoration work. The company also offers salvaged timber, roof tiles, and Welsh slate, each ...

shaping and dressing that is necessary before it is used for building purposes. A number of factors determine whether a rock will be worked as a building stone. These include the volume of material ...