The objective of this Regulation of the Government of the Republic of Slovenia, which is composed of 16 articles and two Annexes, is to eliminate, prevent or reduce harmful effects of arsenic, cadmium, mercury, nickel and polycyclic aromatic hydrocarbons in ambient air on human health and the environment as a whole. This Regulation establishes: (1) target concentrations of arsenic, cadmium, nickel and benzo pyrene in the air; (2) measures to preserve air quality from pollution by arsenic, cadmiu