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Passive Heating [i]and[/i] Cooling
I commented recently that ultrawhite paint and biochar could "save the planet". Here it is paired with Vanta Black and powered by a wax motor.
It looks like it comes down to the weatherability of the coatings and reliability of the hinged flaps.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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