Ключевые слова: abstract, alternative, bio, bulb, car, clean, concept, conservation, design, earth, eco, ecology, electric, energy, environment, friendly, fuel, globe, green, health, hybrid, icon, industry, leaf, light, natural, nature, planet, plant, pollution, power, recycle, recycling, shape, sign, sketch, symbol, technology, transport, trash, tree, vehicle, waste, water, world,