The Moroccan city of Ouarzazate, about 200 kilometers (125 miles) southeast of Marrakech, lies on the edge of the Sahara and is known as the "door to the desert." Ouarzazate is probably best known for the Atlas Film Studios, where blockbusters from "The Mummy" to "Gladiator" and "Game of Thrones" have been filmed. But a new industry is taking shape. Near the city, lying on a high plateau hemmed by the Atlas Mountains, one of the world's largest solar power plants is being built. It is named Noor, meaning light in Arabic. Stretching over nearly 500 hectares (some 1,200 acres), the solar facility produces enough energy to power more than a million homes. But this is not a typical solar farm. Fossil fuels still dominate energy mix Instead of commonly seen black PV panels, Noor uses concentrated solar power . A field of 2 million giant mirrors reflects the sun's rays onto a central receiver that sits at the top of a 247-meter (810-foot) tower.…