The Problem With Wind Energy

"Wind, almost everybody's best hope for big supplies of clean, affordable electricity, is turning out to have complications...But for all its promise, wind also generates a big problem: because it is unpredictable and often fails to blow when electricity is most needed, wind is not reliable enough to assure supplies for an electric grid that must be prepared to deliver power to everybody who wants it - even when it is in greatest demand...A wind machine is a bit like a bicycle that a commuter keeps in the garage for sunny days. It saves gasoline, but the commuter has to own a car anyway."