Volatile organic compounds (VOCs) thousand tonnes N/R 1 GRI Standards disclosures GRI 305-6: Emissions of ozone-depleting substances; GRI: 305-7: NOx, SOx and other significant air emissions; and SASB Metals & Mining Sustainability Accounting Standard EM-MM-120a.1: Air emissions of the following pollutants: (1) CO, (2) NOx (excluding N2O), (3) SOx, (4) particulate matter (PM10), (5) mercury (Hg), (6) lead (Pb), and (7) volatile organic compounds (VOCs).