Former Vice President Al Gore’s 10,070-square-foot estate near Nashville, Tennessee, expended more than 21 times more energy than the average U.S. household over the past year, according to a new report.

A report by the National Center for Public Policy Research — self-described as a nonpartisan, independent conservative think tank — said that according to data obtained from the Nashville Electric Service (NES), a public electric company that powers Mr. Gore’s home and most of Nashville, the 20-room mansion in upscale Belle Meade used 230,889 kilowatt hours (kWh) of electricity during the past 12 months.

That’s roughly 21.4 times more than the 10,812 kWh a year used up by the typical American household, according to the U.S. Energy Information Administration.

The report, first picked up by The Daily Caller, adds that in September 2016 alone, Mr. Gore’s estate “guzzled 30,993 kWh of electricity — an amount more than 34 times the national monthly average.”

“With an average consumption of 22.9 kWh per square foot over the past year, Gore’s home classifies as an ‘energy hog’ under standards developed by Energy Vanguard — a company specializing in energy efficiency methods,” the report said.

The report also claimed that the 33 solar panels installed on Mr. Gore’s home produced only 5.7 percent of the energy his home consumed in the past year. He gets most of his electricity from NES, which is largely derived from coal, nuclear power and natural gas, the report said.

Mr. Gore gave the home a green makeover back in 2007 after the author of this new study, then-president of the Tennessee Center for Policy Research, Drew Johnson, released a report revealing that the “Inconvenient Truth” filmmaker and climate change trailblazer used over 220,000 kWh of electricity a year at the home. Renovations reportedly included installing solar panels, upgrading the windows and installing a pricey geothermal heating system.

So, if the center’s numbers are correct, the house now consumes 10,000 kWh more than it did a decade ago.

“Al Gore has attained a near-mythical status for his frenzied efforts to propagandize global warming,” Mr. Johnson, now a senior fellow of the National Center, said in a statement. “At the same time, Gore has done little to prove his commitment to the cause in his own life. I’m not sure he even believes what he’s saying.”

Not included in Wednesday’s study were Mr. Gore’s two other homes in San Francisco and Carthage, Tennessee.

Mr. Gore’s new documentary “An Inconvenient Sequel: Truth to Power,” the sequel to his Academy Award-winning documentary “An Inconvenient Truth,” premiered in theaters Friday.

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