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Energy star is actually the international standard for the energy efficiency in all consumer products. It was first formed in the United States in mid-1992 as a government program that was attempting to reduce the energy consumption in America, and then several nations in the European Union started to use the program as well, including Australia, Canada, Japan, and Taiwan.
Many of the devices that we use in our daily lives now carry the Energy Star logo, such as our computers, kitchen appliances, and even some buildings. The items that carry the Energy Star logo normally save from 20-30% annually on energy. But, there are several European products that are now labeled under TCO Certification, which is a combined energy usage and ergonomics rating that was developed from the Swedish Confederation of Professional Employees (TCO), and is used instead of the Energy Star program.