Ключевые слова: background, bank, banknote, bill, bulb, business, carbon, cash, change, coin, concept, conservation, cost, credit, crumpled, currency, dollar, economic, economy, edison, efficiency, electric, electricity, energy, exchange, expensive, filament, finance, financial, foreign, glass, idea, investment, lamp, light, loan, money, object, power, rate, rich, stack, symbol, technology, tungsten, value, wealth, white, wooden,