Ключевые слова: alternative, background, blue, car, chance, choice, clean, close, color, concept, conservation, eco, ecological, ecology, electric, electricity, environment, environmental, freshness, friendly, green, growth, horizontal, idea, ideas, image, industry, issues, leaf, leaves, model, natural, nature, nobody, plant, protection, resources, small, sustainable, technology, toy, transport, transportation, up, wheel,