Is this the most energy-efficient way to build homes?

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When the Canadian engineer Harold Orr and his colleagues began designing an ultra-efficient home in Saskatchewan in the late ’70s, responding to a provincial conservation mandate during the oil embargo, they knew that the trick wasn’t generating energy in a greener way, but using less of it. They needed to make a better thermos, not…

https://www.technologyreview.com/2023/12/22/1084532/passive-house-energy-efficient-harold-orr/