| Waste (hazardous/solid/interstate/nuclear) | Waste (hazardous/solid/interstate/nuclear) | 13 |
| Energy/Nuclear | Energy/Nuclear | 7 |
| Science/Technology | Science/Technology | 5 |
| Aerospace | Aerospace | 1 |
| Taxation/Internal Revenue Code | Taxation/Internal Revenue Code | 1 |
| Government Issues | Government Issues | 1 |
| Marine/Maritime/Boating/Fisheries | Marine/Maritime/Boating/Fisheries | 1 |
| Advertising | Advertising | 1 |
| District of Columbia | District of Columbia | 1 |
| Computer Industry | Computer Industry | 1 |
| Health Issues | Health Issues | 1 |
| Defense | Defense | 1 |
| Disaster Planning/Emergencies | Disaster Planning/Emergencies | 1 |
| Financial Institutions/Investments/Securities | Financial Institutions/Investments/Securities | 1 |
| Telecommunications | Telecommunications | 1 |
| Banking | Banking | 1 |
| Arts/Entertainment | Arts/Entertainment | 1 |
| Aviation/Airlines/Airports | Aviation/Airlines/Airports | 1 |
| Medical/Disease Research/Clinical Labs | Medical/Disease Research/Clinical Labs | 1 |
| Alcohol and Drug Abuse | Alcohol and Drug Abuse | 1 |