Energy-efficient washing machines

From Is a Dishwasher a Green Machine?:

To really green up your automatic dishwashing, you should always use the air-drying function, avoid the profligate “rinse hold” setting, wash only full loads, and install the machine far away from your refrigerator.

Just promise that you’ll scrape your dishes instead of pre-rinsing, use the shortest wash cycles possible, and buy phosphate-free detergents – or, if you’re handy with a blender, make your own.