Ключевые слова: bill, cash, coins, cost of light, cost of living, costs, ecology, economy, ecosustainability, electricity, electricity costs, energy, energy tariffs, environment, environmental protection, eur, expenses, household budget, increase, increase in costs, increases, light, light bulb, lighting, money, ordinary costs, ordinary expenses, piggy bank, pot, price increases, saving, savings, sustainability, sustainable, tariff, value,