Power & Heating

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Batteries
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Biodiesel
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Biogas
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Biomass boilers
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Charcoal making
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Community energy
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Energy saving
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Gasification
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Green electricity
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Heat pumps
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Insulation
LED lighting
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Low-impact energy
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Masonry stoves / kachelofens
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Micro-hydro
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Pedal-powered machines
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Rocket stoves & mass heaters
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Solar cookers
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Solar electricity
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Solar hot water
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Wind generators
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Wood stoves