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Contaminant : 73 phrases in 22 subjects |
| Agriculture | 2 |
| Biotechnology | 2 |
| Coal | 1 |
| Construction | 4 |
| Earth sciences | 2 |
| Economics | 1 |
| Environment | 12 |
| Food industry | 1 |
| General | 3 |
| Geology | 1 |
| Health care | 7 |
| Information technology | 4 |
| Medical | 2 |
| Municipal planning | 2 |
| Name of organization | 10 |
| Natural resourses and wildlife conservation | 4 |
| Nuclear physics | 8 |
| Pharmacy and pharmacology | 1 |
| Research and development | 2 |
| Technology | 1 |
| Transport | 1 |
| Ventilation | 2 |