Ключевые слова: alternative, backdrop, background, banner, bio, bright, chemical, color, concept, design, earth, eco, ecology, ecosystem, environment, factory, flat, garbage, gas, green, house, icon, illustration, isolated, light, mill, nature, plant, pollute, pollution, power, recycle, save, set, sign, solar, style, sun, sustainability, symbol, toxic, turbine, vector, waste, water, wind, world,