Ключевые слова: abstract, alternative, background, bills, blue, cash, cell, clean, collector, conserving, consumption, dollar, earnings, eco, ecological, ecology, economy, electricity, energy, environment, extraction, future, generation, generator, green, industry, innovation, light, money, panel, photovoltaic, plans, power, preserving, production, recovery, renewable, resources, savings, sky, solar, sun, sunlight, supply, system, technology,