Unified Alcasa Trade Unions (Sintralcasa) leader Henry Arias has told the local newspaper Correo del Caroni that a critical lack of investment is strangling the state-owned heavy industry conglomerate, the Venezuelan Guayana Corporation (CVG) aluminum processing subsidiary CVG-Alcasa with he result that only 123 units of a total 592 existing in four lines means that the production of primary aluminum is currently operating at 20% of its installed capacity.