The Minister of Home Affairs an the Environment has made, by virtue of the powers conferred by article 9 of the Environment Protection Act, the present regulations for the following purposes: (a) to establish long-term objectives, target values, an alert threshold as well as an information threshold for concentrations of ozone in ambient air in Malta; (b) to ensure that common methods and criteria are applied in the assessment of concentrations of ozone and ozone precursors in ambient air; (c) t