Ключевые слова: background, bio, biology, biotechnology, clean, climate, conservation, design, earth, eco, ecology, electricity, energy, environment, environmental, flatdesign, fuel, gas, global, green, healthy, house, icon, industry, light, line, nature, oil, organic, panel, petrol, plant, pollution, power, protection, recycle, renewable, resources, save, sign, solar, station, sustainable, symbol, thin, tree, waste, water, weather,