Across all IGO managed operations, energy consumption totalled 2,119,437GJ in FY18, including exploration and corporate. Despite reducing energy consumption at both our Long Operation (3%) and at Jaguar (6%), the shift to full production rates at the Nova Operation has increased our total energy consumption. IGO’s energy needs are primarily met through the burning of diesel, most of which goes into the production of electricity (in dedicated diesel fuelled power stations) and, to a lesser extent, in diesel combustion engines intrinsic to much of a mine’s mobile plant (e.g. trucks and earthmoving machinery). Beyond diesel consumption, the next most notable source of energy is the chemical energy associated with explosives. Figures 28 to 30 illustrate the relative energy efficiencies of IGO’s mines. While these metrics provide insight into our processes and provide a tool for gauging change in our individual operations, they are not particularly useful as a means to compare one mine to another, or even the same mine over time. This is because the energy consumed in a mine is a function of a great number of factors that both vary over time and are mine-specific. For example, the hardness of the rock being mined and beneficiated varies both within a mine and between mines; the harder the rock, the more energy consumed. Another example is the depth of the mine; the deeper you mine the more energy required to haul ore and waste to the surface. Given the limitations in seeking meaningful efficiency metrics (and hence improvement targets) associated with mine energy consumption, it is likely IGO will focus on the source of energy; where energy from renewable sources are clearly better than energy derived from non-renewables on a comparable unit cost basis. Further, given that we see the anticipated improvement in battery technologies both in terms of energy densities and costs, we will strive to use suitable electric mining plant to replace diesel plant as the technology becomes available and cost effective. ENERGY PRODUCTION AND CONSUMPTION FIGURE 29 ENERGY CONSUMPTION PER TONNE NICKEL PRODUCED – LONG FY13 FY14 FY15 FY16 FY17 FY18 20 15 10 12,000 10,000 8,000 6,000 4,000 2,000 0 Tonnes metal produced GJ Consumed/ Tonne metal produced FIGURE 30 ENERGY CONSUMPTION PER TONNE METAL (CU & ZN) PRODUCED – JAGUAR FY13 FY14 FY15 FY16 FY17 FY18 30 25 20 15 10 60,000 50,000 40,000 30,000 20,000 10,000 0 Tonnes metal produced GJ Consumed/ Tonne metal produced FIGURE 28 ENERGY CONSUMPTION PER TONNE METAL (NI, CU & CO) PRODUCED – NOVA FY17 FY18 140 120 100 80 60 40 20 0 35,000 30,000 25,000 20,000 15,000 10,000 5,000 0 Tonnes metal produced GJ Consumed/ Tonne metal produced Affordable and clean energy ENERGY CONSUMPTION METRIC TOTAL METAL TONNES 80 — IGO SUSTAINABILITY REPORT 2018