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Military Patent Infringement (Pentagon takes your genius crap)

http://www.bloomberg.com/news/articles/2016-06-08/congratulations-your-genius-patent-is-now-a-military-secret

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Friday, March 12, 2021

Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained

 https://youtu.be/PI45yUhUWgk

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