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Terms for subject Ecology containing Clean | all forms | exact matches only
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Clean Coal Technologytecnologia do carvão limpo
Clean Coal Technologytecnologias limpas do carvão
Clean Coal TechnologyTecnologia de queima limpa do carvão
flue gas cleaninglimpeza dos gases de combustão
flue gas cleaningdepuração dos fumos
stack gas cleaninglimpeza dos gases de combustão