Ключевые слова: air, anti, atmosphere, black, bubble, carbon, carbonic, cloud, co2, combustion, contamination, damage, design, dioxide, eco, ecology, element, emission, emissions, emit, environment, environmental, exhaust, filled, flat, gas, global, glyph, greenhouse, icon, isolated, logo, nature, over white, pollutant, pollute, pollution, print, product, reduce, reduction, sign, signs, silhouette, smoke, symbol, web,