For example, wind technology in the form of large-scale wind power is a modification of an old windmill. The problem is to allow construction to buy 15 additional issues turbine meters only. The same applies to the new system of rainwater. Many of us, in order to collect rainwater from the roof of the old house still remember the old rain barrel. (Show my age), this technology is simply cleaned and polished.
Temperature geothermal systems are another way to reduce heating costs. In theory, taking the heat from the soil turned into energy by using heat pump works like a standard refrigerator (there are other technologies.)
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