| Clue | Source | Date |
|---|---|---|
| Sun-blocking weather phenomena | ||
| Unhealthy blankets | New York Times | 16 Dec 2022 |
| Pollution problems that affects visibility | ||
| Urban pollutions | ||
| Causes of bad air days | Universal | 01 May 2017 |
| Causes of bad air days | ||
| Obscures, with ''up'' | Newsday | 16 Apr 2015 |
| Urban woes | Eugene Sheffer | 25 Mar 2015 |
| L.A. hazes | Premier Sunday | 01 Mar 2015 |
| Urban pollutants | ||
| Obscures, with "up" | ||
| Dirty blankets? | ||
| L.A. hazes | ||
| Suffocating blankets | ||
| Bad air conditions | ||
| They are smoky and foggy | ||
| Urban pollutions | ||
| Urban palls | ||
| Urban pollutions | ||
| Suffocating blankets | ||
| EPA concerns | ||
| Urban blights | ||
| Urban woes | ||
| Smoky, foggy conditions | ||
| EPA concerns | ||
| Bad air conditions | ||
| Air pollutants | ||
| They may be photochemical | ||
| Urban problems | ||
| Urban woes | ||
| L.A. problems | ||
| Hazes | ||
| Hazes of a sort | ||
| Weather problems | ||
| City blankets | ||
| Murky atmospheres. | ||
| Atmospheric problems. | ||
| City problems. | ||
| Air pollutions. | ||
| Mixtures of smoke and fog. | ||
| Suffocating blankets? |