Ключевые слова: alternative, atom, bulb, business, cityscape, concepts, conservation, contemporary, dam, decorative, design element, ecology, electricity, energy, factory, flat, fossil, fuel, geothermal, global, graphic, house, human, hydroelectric, icon, ideas, industry, infographic, interface, line, linear, nuclear, oil, panel, pictogram, plant, power plag, production, solar power, source, station, stroke, symbol, technology, template, tower, transportation, turbine, wind turbine,