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elancaster65, korny09 likes this
"Solar thermal collectors skip the electricity conversion and supply renewable thermal energy in a direct and efficient way. Much less known is that a mechanical windmill can do the same in a windy climate -- by eliminating electricity conversion and by oversizing its brake system, a windmill can generate lots of heat through friction."
Low-Tech Magazine looks like a pretty cool magazine, too.
Added in Interesting, DIY
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