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Thermal energy from lignite (direct)
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Thermal energy from lignite (indirect)
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Thermal energy from lignite (indirect)
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Thermal energy from lignite (indirect)
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Thermal energy from lignite (indirect)
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Thermal energy from lignite
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Thermal energy from lignite
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Thermal energy from lignite
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Thermal energy from lignite
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Thermal energy from light fuel oil (LFO) (residential heating system)
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