Stay cool without electricity: New "radiative sky cooling" system may prove useful for preppers

Stay cool without electricity: New "radiative sky cooling" system may prove useful for preppers
(Natural News) Staying cool during hot or humid weather without racking up a hefty electricity bill could be a reality in the near future. A team of researchers from Stanford University have developed a passive cooling system that sends excess heat towards outer space. Since almost no energy is required to keep them functional, these…
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