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NFR 11 - NATURAL SOURCES
| Category Code | Name of category | Method | AD | EF |
|---|---|---|---|---|
| 11 | Natural Sources | see sub-categories | ||
| consisting of / including source categories | ||||
| 11.A | Volcanoes | not occurring in Germany | ||
| 11.B | Forest Fires | CS, T2 | CS | D |
| 11.C | Other Natural Sources | see sub-categories | ||