| Subject | English | Lithuanian |
| energ.ind. | conventional fossil fuel | tradicinis iškastinis kuras |
| environ. | European Technology Platform for Zero Emission Fossil Fuel Power Plant | Europos technologijų platforma, skirta aplinkos neteršiančioms iškastinį kurą deginančioms elektrinėms |
| econ. | fossil fuel | iškastinis kuras |
| environ. | fossil fuel The energy-containing materials which were converted over many thousands of years from their original form of trees, plants and other organisms after being buried in the ground. Physical and chemical processes occurred in the Earth's crust that changed them into coal, peat, oil or natural gas | iškastinis kuras |
| obs., energ.ind. | fossil fuel | organinis kuras |
| energ.ind. | non-fossil energy | ne iškastinė energija |