Ключевые слова: brown, business, clean, clean energy, cost, eco, ecology, electric, electricity bill, energy, energysaving, environment, environmental issues, expense, gas, gas company, gas prices, green, household, japan, japanese, leaves, liberalization, lifeline, lifestyle, natural, natural energy, nuclear energy, nuclear power plant, power generation, power plant, powersaving, recycling, reduction, safe bright, safety, save, thrifty, water, water bill, water saving,