A new cookbook highlighting ways of staying sustainable in the kitchen suggests that dishwashers may actually save money. Writing for the Associated Press, Michele Kayal noted that The Green Kitchen by the Times food columnist Richard Ehrlich is full of simple tips to keeping food preparation areas as environmentally-friendly as possible. She stated A truly engaging book about making hundreds of small changes, its full of gee-whiz information. To wit Dishwashers actually save water.Other pearls of wisdom outlined in the publication, Ms Kayal explained, include using the refrigerator to defrost food, as this will reduce energy consumption. Those looking to purchase a more efficient oven should buy a self-cleaning cooker due to the fact they are better insulated.A recent joint report by the Energy Saving Trust and the Environment Agency urged homeowners to fill the kitchen sink up when cleaning dishes rather than leaving them running under a tap.