Walthers Cornerstone Metro Power & Light HO Building KitDetails: North America demands a steady supply of electrical power, and much of it comes from up to date facilities like Walthers Cornerstone Metro Power and Light. Here, a steady stream of unit trains bring in clean burning coal to feed the turbines that drive the generators. You'll also find a variety of air and water treatment equipment to reduce harmful emissions into the environment. Outside, clean, simple lines using colored steel panels produce