Ключевые слова: alternative, barrel, battery, black, broadcast, bulb, cable, canister, charging, communication, ecology, electric, electrical, electricity, energy, environment, fuel, gas, gold, golden, green, hydro, icon, illustration, isolated, lamp, leaf, led, light, lightbulb, nature, network, outlet, panel, plug, power, propane, radio, river, rosette, set, signal, sun, technology, vehicle, water,