America's economy, population, and refrigerators are all much bigger than they were 40 years ago. Though a new refrigerator today is bigger than one was 4 decades ago, it uses a stunning 72% less electricity.
http://www.eia.gov/todayinenergy/detail.cfm?id=10491.
Since the 1973 oil embargo and energy crisis, a new refrigerator's annual electricity usage has plunged from about 1800 kilowatt-hours to less than 500 kilowatt-hours. This is just one example, among legions, of the power of the Great American Energy Diet that is reshaping the demand side of America's energy markets.
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