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| self-cleaning; self-purification | |||
| self-disinfection; self-pruning; natural-pruning | |||
| self-cleansing | |||
| intrinsic bioremediation; self-purification A natural process of organic degradation that produces nutrients utilized by autotrophic organisms | |||
| Selbstreinigung: 6 phrases in 5 subjects |
| Construction | 1 |
| Environment | 2 |
| General | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |