Self-Sufficient Life And How To Live It from John Seymour

What is cleantech? Cleantech in the narrow sense includes green technologies like: Renewable energy (solar, wind, geothermal, biofuels) Green buildings Energy efficient and low emission transportation Biomaterials like bioplastic Water filtration With cleantech in the narrow sense one still means manmade technologies. For example solar panels, photovoltaic (PV) modules, high efficiency heat pumps and so [...]

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