correction! make that a several thousand square mile area in the Sahara - a little over 1% of the desert. from Time 1/15/2009
A few years ago, scientists began to calculate just how much energy the Sahara holds. They were astounded at the answer. In theory, a 35,000-sq.-mi. (90,600 sq km) chunk of the Sahara — smaller than Portugal and a little over 1% of its total area — could yield the same amount of electricity as all the world's power plants combined. A smaller square of 6,000 sq. mi. (15,500 sq km) — about the size of Connecticut — could provide electricity for Europe's 500 million people. "I admit I was skeptical until I did the calculations myself," says Michael Pawlyn, director of Exploration Architecture, one of three British environmental companies comprising the Sahara Forest Project, which is testing solar plants in Oman and the United Arab Emirates. Pawlyn calls the Sahara's potential "staggering."