Springing up on the edge of the Sahara desert are rows of curved mirrors as far as the eye can see. They're part of what could become the biggest solar power plant in the world. Morocco is investing about $2.6 billion on the construction of the Ouarzazate complex, which forms the heart of a $9 billion strategy to harness one of the country's greatest natural resources - sunshine. When completed in 2017, it will cover an area nine times the size of New York's Central Park and generate enough electricity to power about one million households. Morocco has been developing solar and other sources of renewable power for years. It has just set itself the ambitious target of meeting just over half the nation's electricity needs from renewable power by 2030. Morocco is using solar technology that operates very differently from traditional solar panels, which use photovoltaic cells to convert sunlight directly into electricity. The Ouarzazate complex uses large curved mirrors" that track the sun like flowers and channel radiation to generate steam inside a network of tubes. The steam drives a central turbine that generates electricity, which flows into the national grid for use by Moroccan homes and businesses. Perhaps most impressive is that the complex can continue to operate after the sun sets. Heat from the system can be stored for hours in tanks filled with molten salts. That allows steam to be generated for hours and keep turning the turbine at night.