Ключевые слова: air, atmosphere, bubble, carbon, chemical, chemistry, cloud, co2, co2 emission, design element, dioxide, dirty, distress, eco, ecology, effect, emission, environment, environmental, exhaust, fog, gas, greenhouse, grunge, icon, pattern, pictogram, pictograph, pollute, pollution, raster, rough, rubber, scratched, sign, sketch, sky, smog, smoke, symbol, texture, textured, unclean, warming, waste, weather,