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In my High School Physics class, the teacher tried to give us an understanding of what we paid for heating and electricity; so we went home and gathered some information to bring back to the class.
It amounted to a lot of money.
One person in the class, however, was part of a family which had been off the grid, generating their own power for the past twenty years. I can't even remember the figures, but they were amazing. They had spent way less money, the initial investment had been recovered loong ago. And the initial investment for them, twenty years ago, was vastly more than it is now.
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