Ключевые слова: alternative, background, bio, care, clean, concept, conservation, development, earth, eco, ecological, ecology, electricity, element, energy, environment, environmental, friendly, fuel, global, graphic, green, icon, illustration, infographic, innovation, natural, nature, nuclear, panel, planet, plant, pollution, power, protection, recycle, recycling, renewable, save, science, sign, solar, source, sun, sustainability, sustainable, symbol, technology, turbine, wind,