Concrete is widely used today for construction, although it has a large amount of carbon emissions during manufacture. Concrete has been used in construction for centuries, however, and the Lawrence Berkeley National Laboratory recently announced that some researchers working in Naples, Italy, took samples from a 2000-year-old Roman breakwater that showed the concrete they used was more durable than modern concrete and was also possibly created with less carbon emissions. The samples suggest that the Roman concrete could have been baked at temperatures as low as 1652 degrees F, compared to the 2600 degrees F that we create concrete at today.
Read the full article here: Taking the Environmental Sting Out of Concrete