Ключевые слова: alternative, art, background, battery, cell, clean, concept, conservation, contour, design, eco, ecology, electric, electrical, electricity, energy, environment, environmental, equipment, flat, generation, generator, graphic, green, house, icon, illustration, industry, innovation, isolated, light, line, linear, lineart, modern, nature, new, outline, panel, power, renewable, sketch, solar, station, sun, sunlight, supply, symbol, technology,