Ключевые слова: abstract, alternative, art, background, bio, blue, cell, clean, concept, contour, design, drop, eco, ecology, electric, electricity, energy, environment, environmental, equipment, flat, glowing, green, icon, illustration, industry, isolated, leaf, light, lightning, line, linear, lineart, natural, nature, neon, outline, panel, pink, plant, power, renewable, save, saving, sign, sun, sunlight, symbol, technology,