An article at Time explains "How the Ice in Your Drink is Imperiling the Planet," and what regulators are doing about it:
NIST is thus urging refrigerator manufacturers to look closely at the design of their icemakers, insisting that there are "substantial opportunities for efficiency improvements merely by optimizing the operations of the heaters." That appeal to reason, NIST officials hope, will be enough. But just in case it isn't, the Department of Energy has announced that it intends to add 84 kilowatt hours to the efficiency rating of every refrigerator equipped with an icemaker. Consumers will feel that fact in the wallet—and if manufacturers don't scramble to improve their numbers, they soon will too.