Ключевые слова: air, alternative, battery, clean, collection, concept, contour, design, eco, ecology, editable, electric, electricity, energy, farm, field, flat, future, generation, generator, graphic, green, home, house, icon, illustration, industry, line, mill, monochrome, offshore, outline, power, propeller, recycling, renewable, rotate, set, signs, station, stroke, sun, symbol, technology, thin, tower, turbine, wind, windmill,