Keep your microwave clean and you'll be able to maximize its energy. This means less electricity used, less money spent, and less time cooking. Microwaves are between 3.5 and 4.8 times more energy efficient than traditional electric ovens. If it costs ten cents to cook one item in a microwave, it would cost forty-eight cents to cook the same item in a standard oven. If everyone in North America cooked exclusively with a microwave for a year, we'd save as much energy as the entire continent of Africa consumes in that time.  

Facts Taken From: "The Green Book", by Elizabeth Rogers and Thomas M. Kostigen