Ключевые слова: alternative, art, background, battery, bright, cell, color, colorful, concept, conservation, contour, eco, ecology, electric, electrical, electricity, energy, environment, environmental, equipment, flat, generation, glowing, green, icon, illustration, industry, isolated, light, line, linear, lineart, modern, nature, neon, outline, panel, power, purple, renewable, solar, sun, sunlight, supply, technology,