Casters kamar yadda aka sani ga jama'a a matsayin masana'antu, amma aikace-aikacen rayuwa a ko'ina, idan aka kwatanta da kasashen waje dubun daruruwan shekaru na masana'antar caster, masana'antar simintin gida ta fara a makare.A duniya baki daya, alamar karnin da ta gabata sau da yawa tana rubuta inganci da alfahari a cikin duniya, babban ...
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