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| fossiler Brennstoff; konventioneller Brennstoff | |||
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| fossile Brennstoffe; fossile Energieträger | |||
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| Brennstoff m (fossil) | |||
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fossil fuel : 18 a las frases, 8 temas |
| Ambiente | 3 |
| Ecología | 2 |
| Electrónica | 1 |
| Finanzas | 2 |
| General | 2 |
| Industria energetica | 6 |
| Minería | 1 |
| Tecnología | 1 |