Ключевые слова: alternative, battery, bio, blade, cell, clean, cloud, concept, design, earth, eco, ecological, ecology, electricity, element, energy, environment, environmental, equipment, graphic, green, icon, illustration, image, isolated, label, leaf, logo, natural, nature, panel, planet, plant, plug, power, protection, recycle, renewable, save, sign, solar, source, sun, symbol, technology, tree, turbine, wind, windmill,