Ключевые слова: battery, blue, cell, charge, clean, concept, conservation, day, electrical, electricity, energy, environment, environmental, equipment, field, futuristic, generate, generation, generator, grass, green, innovation, light, metal, mountain, natural, nature, new, outdoor, panel, pattern, photocell, photovoltaic, portable, power, recycling, reflection, renewable, resource, science, sky, small, solar, sun, sunlight, sunny, supply, support, technology, warm,