| Coal (7) |  |
| Gemstones (14) | |
| Miner (1) | |
| Minerals (90) | |
| Mining (8) | |
| Mining companies (1) | |
| Mining engineering (1) | |
| Mining techniques (1) | |
| Ore minerals (18) | |
| Rock types (3) | |
| Coal (7) | |
| Gemstones (14) | |
| Miner (1) | |
| Minerals (90) | |
| Mining (8) | |
| Mining companies (1) | |
| Mining engineering (1) | |
| Mining techniques (1) | |
| Ore minerals (18) | |
| Rock types (3) | |
and Mining engineering and Agricultural production of UPM shows that the biochar produced from manure of cattle,
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