Ключевые слова: abstract, background, bill, bills, bright, bulb, coins, concept, conservation, design, eco, ecology, electric, electricity, energy, environment, equipment, fresh, glass, green, home, house, idea, innovation, inside, isolated, lamp, leaf, led, light, money, nature, plant, power, recycling, renewable, save, saving, savings, small, solution, sprout, symbol, technology, vintage, white,