At this time of the year, sparkling trees and decorated lawns have taken over. A 2008 study from the US Energy Department’s Energy Information Administration (EIA) found that decorative seasonal lights accounted for 6.6 billion kilowatt hours of electricity consumption every year in the United States. That’s just 0.2% of the country’s total electricity usage, but it could run 14 million refrigerators. It’s also more than the national electricity consumption of many developing countries, such as El Salvador, Ethiopia, Tanzania, Nepal, or Cambodia.
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