| fumes(noun, air, obscurity, contamination, mist) |
| overcast(gloom, obscurity, darkness, puff, mist) |
| steam(noun, gloom, air, obscurity, darkness) |
| acid rain(noun, pollution) |
| billow(gloom, obscurity, darkness, puff, mist) |
| blight(contamination, effluence) |
| blur(noun, obscurity, fogginess, mistiness) |
| confusion(noun, mist, vapor) |
| contamination(noun, effluence) |
| darkness(gloom, obscurity, puff, mist, fogginess) |
| dimness(gloom, obscurity, darkness, puff, mist) |
| effluence(noun, contamination) |
| exhalation |
| fogginess(noun, gloom, obscurity, darkness, puff) |
| frost(gloom, obscurity, darkness, puff, mist) |
| gas(noun, exhaust, air, smoke) |
| gloom(obscurity, darkness, puff, mist, fog) |
| greenhouse gasses(expression, idiom, contamination, effluence) |
| ground clouds(expression, obscurity, mist, fog, vapor) |
| haziness(noun, gloom, obscurity, darkness, puff) |