Well-known examples of appropriate technology applications include: bicycle commuting, bike- and hand-powered water pumps (and other self-powered equipment), the universal nut sheller, self-contained solar-powered light bulbs and streetlights, and passive solar building designs. Today appropriate technology is often developed using open source principles.
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The term economics comes from the Ancient Greek oikonomia, management of a household, administration; from oikos, "house" + nomos, "custom" or "law", hence "rules of the house(hold)" Neighborhood economics extneds that to small communities and how they trade goods and services, while taking care of their households.
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Community food security comes from many elements. It can be urban, suburban, or rural. It can grow flowers, vegetables or community. It can be one community plot, or can be many individual plots. It can be at a school, hospital, or in a neighborhood. It can also be a series of plots dedicated to "urban agriculture" where the produce is grown for a market.
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