Concrete can help to save the environment.
Well, maybe it can't clean the air or the water, but because of a separation process developed at the University of Kentucky it can use up the mountains of ash created by power plants. Fly ash, the by-product of burning finely ground coal, is captured from exhaust gases, collected and processed to be used as a partial replacement for cement in concrete. Fly ash reacts when mixed with lime and water to form cement-like minerals but has several advantages over cement. Fly ash is a very fine, spherical, glassy material. It spreads and settles better, lasts longer and resists weather damage better than cement.