Ключевые слова: background, building, button, concept, condominium, consumption, control, cost, earth, eco, ecology, efficiency, electricity, energy, environment, expenditure, expenses, finger, future, hand, home, hour, house, household, idea, light, money, off, plate, power, press, protect, push, reduce, residential, resource, room, save, security, surge, sustainability, switch, technology, think, toggle, turn, usage, utility, wall, world,