| 100% | EPA | 3 | Government group concerned with air quality: Abbr. |
| 94% | EPA | 3 | Government group concerned with air quality (Abbr.) |
| 90% | EPA | 3 | Government group concerned with the air quality index: Abbr. |
| 83% | EPA | 3 | Group concerned with air quality: Abbr. |
| 83% | EPA | 3 | Government group concerned with air purity: Abbr. |
| 81% | EPA | 3 | Government agency concerned with air quality: Abbr. |
| 77% | EPA | 3 | Govt. group concerned with air quality (Abbr.) |
| 74% | EPA | 3 | Government group concerned with clean air (Abbr.) |
| 68% | EPA | 3 | Federal organization concerned with air quality: Abbr. |
| 67% | NSA | 3 | Government group concerned with electronic surveillance: Abbr. |
| 67% | EPA | 3 | Government group concerned with carbon emissions: Abbr. |
| 67% | EPA | 3 | Organization concerned with air quality: Abbr. |
| 67% | CIA | 3 | Government group concerned with cybersecurity: Abbr. |
| 67% | NSA | 3 | Government group concerned with surveillance: Abbr. |
| 66% | EPA | 3 | Government group concerned with exposure to pollutants: Abbr. |
| 64% | EPA | 3 | Group concerned with clean air: Abbr. |
| 62% | EPA | 3 | Federal department concerned with air quality (Abbr.) |
| 62% | EPA | 3 | Government group concerned with clean water (Abbr.) |
| 62% | EPA | 3 | Government group concerned with plastic pollution (Abbr.) |
| 62% | EPA | 3 | Agency concerned with air quality (Abbr.) |
| 62% | EPA | 3 | Government group concerned with pollution (Abbr.) |
| 59% | EPA | 3 | Government group with an Office of Air and Radiation: Abbr. |
| 58% | EPA | 3 | Federal group concerned with clean air (Abbr.) |
| 55% | EPA | 3 | Org. concerned with air quality |
| 54% | EPA | 3 | Federal dept. concerned with air quality |
| 52% | TSA | 3 | Organization concerned with air-travel safety: Abbr. |
| 52% | ACLU | 4 | Group concerned with personal liberties: Abbr. |
| 52% | TSA | 3 | Group concerned with airport safety: Abbr. |
| 52% | PTA | 3 | Group concerned with students' welfare: Abbr. |
| 51% | EPA | 3 | Air quality group: Abbr. |