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| coal | |||
| 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 | |||
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akmenogles : 8 phrases in 5 subjects |
| Chemistry | 1 |
| Coal | 3 |
| Ecology | 1 |
| Economics | 1 |
| Environment | 2 |