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2.3 u prvih 50 godina korištenja fosfatnih ruda malo se pažnje pridavalo problemima i prilikama koji proizlaze iz dosad opisanih okolnosti.
2.3 problems and opportunities arising from the above received little attention for the first 50 years of phosphate rock usage.
najstariji podaci govore da se već 1210 . godine vadila bakrena ruda , a u to vrijeme selo rude imalo je naziv rovi .
according to the oldest available data , copper ore was extracted as early as 1210 , and back then the village of rude was called rovi .
3.1.1 fosfatna ruda je primarni izvor fosfora koji služi za povećanje prinosa usjeva i rast životinja, a time i održanje sve brojnijeg stanovništva.
3.1.1 phosphate rock is the primary source of phosphorus to increase crop yields and animal growth and thereby to sustain ever larger populations.