Ключевые слова: alternative, climate, conceptual, conservation, creativity, crisis, development, discovery, dusk, earth, eco, ecologic, ecological, efficiency, electricity, electronic, energetic, environmental, friendly, fuel, future, generate, generation, generator, global, harvest, hope, idea, illuminate, innovation, invention, lamp, lightbulb, planet, pollution, power, process, protect, protection, recycle, recycling, renewable, resource, responsibility, safe, save, saving, science, solar, solution, source, sunrise, sustainability, sustainable, turbine, twilight, warming, wind, windmill, world,