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| black coal A natural black graphitelike material used as a fuel, formed from fossilized plants and consisting of amorphous carbon with various organic and some inorganic compounds | |||
| coal | |||
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akmenogles : 8 Phrasen in 5 Thematiken |
| Chemie | 1 |
| Kohle | 3 |
| Ökologie | 1 |
| Umwelt | 2 |
| Wirtschaft | 1 |