Ключевые слова: alternative, aqua, barrel, brain, cable, canister, clean, climate, cloud, connect, connection, creative, drop, eco, ecology, electric, electrical, electricity, energy, environment, fuel, gas, green, human, icon, illustration, innovation, intelligence, isolated, lamp, leaf, light, lightning, liquid, nature, outlet, power, recycle, red, rosette, set, sky, socket, symbol, technology, water, weather, white,