It’s an anomaly, a good one. Energy use is down, even where economic activity is up.

That’s the word from the latest report on energy efficiency markets from the International Energy Agency.

Energy consumption has dropped to levels not seen since the 1980s in the 29 IEA countries, which include the United States. At the same time, per capita income has never been higher, according to IEA’s “Energy Efficiency Market Report 2015,” released last week.

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