Environmental Management

At MMG, we are committed to responsible environmental stewardship across the full life cycle of our operations. Our approach is guided by our Safety, Security, Health, Environment and Community (SSHEC) Policy and embedded in our Sustainability Framework. We aim to minimise our environmental footprint, enhance biodiversity, and contribute to climate resilience through proactive planning, site-specific strategies, and transparent reporting. 

Strategic Focus Areas 

Our environmental management priorities include: 

• Efficient Resource Use: Reducing energy and water consumption, optimising material use, and improving operational efficiency. 
• Waste and Emissions Management: Managing tailings, hazardous and non-hazardous waste, and reducing greenhouse gas (GHG) emissions. 
• Biodiversity and Land Stewardship: Protecting ecosystems, restoring disturbed land, and integrating traditional knowledge into land use planning. 
• Climate Change and Resilience: Aligning with TCFD and IFRS S2 to assess and disclose climate-related risks and opportunities.  

Quantified Environmental Targets 

MMG has established measurable environmental goals to drive performance and accountability: 

• 30% reduction in Scope 1 and 2 GHG emissions by 2030 from a 2020 base year 
• No net loss of biodiversity across all sites by 2030 from a 2020 base year 
• 100% alignment of eligible tailings facilities with the Global Industry Standard on Tailings Management (GISTM) by 2026 

These targets are tracked through our ESG Databook and reviewed quarterly by the Executive Committee. 

Environmental Performance and Assurance 

We publish year-on-year environmental performance data in our Sustainability Reports, including air emissions, water use, waste volumes, energy consumption and rehabilitation progress. Selected data is externally assured in accordance with the ICMM Assurance Procedure and ISAE 3000 standards. Our sites also maintain ISO 14001-certified Environmental Management Systems where applicable. 

Risk Management and Resilience 

Environmental risks are integrated into MMG’s enterprise risk management framework. Site-level risk registers include climate-related risks, water scarcity, biodiversity loss, and tailings integrity. Mitigation actions include flood control infrastructure, progressive rehabilitation, decarbonisation strategies, and enhanced monitoring systems. 

Circular Economy and Innovation 

MMG is exploring circular economy opportunities, including: 

• Reuse of tailings and waste rock in construction and rehabilitation 
• Reuse of process water 
• Recovery of metals from waste streams 
• Piloting renewable energy and low-carbon fuel alternatives 

These initiatives support resource efficiency and emissions reduction. 

Environmental Training and Culture 

All employees and contractors receive environmental training as part of site inductions and ongoing development. In 2024, over 90% of site personnel completed modules on biodiversity protection, waste segregation, and spill response. 

Community Engagement in Environmental Stewardship 

MMG works closely with host communities to co-design land use plans, monitor environmental impacts, and implement conservation projects. Community feedback informs our rehabilitation priorities and biodiversity programs. 

For our performance see our Sustainability Reports and Databook’s. 

For specific information please browse the links below: 

• Air Quality Management 
• Cultural Heritage
• Climate Strategy
• Nature
• Mine Closure and Life of Asset Planning
• Noise and Vibration Management 
• Tailings Management
• Waste Management
• Water Management
• Updated ESIA and Environmental Management Plan for Kinsevere Mine
• Updated ESIA and Environmental Management Plan for Kinsevere Mine (French)
• Environmental Management Plan Review 2016-2021 for Rosebery Mine
• Annual Monitoring Review and Management Report 2021-22 for Rosebery Mine 

MMG’s Nature Strategy 

Launched in 2024, the MMG Nature Strategy provides a clear path to understanding, managing, and enhancing nature across our global operations. Our Strategy is tailor-made and will support the unique environments and requirements of each of our operations, responding to their specific needs and setting unique targets and initiatives for each site. The Strategy aligns with the ICMM’s Nature Positive Statement and the Taskforce on Nature-related Financial Disclosures (TNFD), and is structured around three pillars: 

• Enhancing Biodiversity: Site-specific restoration and conservation programs. 
• Building Climate Resilience: Integrating nature-based solutions into climate adaptation planning. 
• Fostering Sustainable Development: Collaborating with communities to co-design land use and rehabilitation plans. 

Each site has completed a baseline assessment and developed action plans to address 28 nature-related performance metrics. These plans will be integrated into operational budgets and reviewed quarterly by site General Managers. 

Explore the Strategy and what it means for MMG: 

• MMG Nature Strategy 
• MMG Nature Strategy (Chinese) 
• MMG Nature Strategy (Spanish) 
• MMG Nature Strategy (French) 

Board Oversight of Environmental Stewardship 

At MMG, our Board of Directors plays a critical role in overseeing the company’s environmental strategy and performance. The Board, through the Governance, Remuneration, Nomination and Sustainability (GRNS) Committee, is responsible for ensuring that MMG maintains high standards of environmental governance across all operational domains. This includes: 

• Waste Management: Oversight of policies and performance related to the responsible handling, reduction, and disposal of mineral and non-mineral waste. 

• Wastewater Management: Governance of water treatment, discharge compliance, and reduction initiatives to protect ecosystems and community water sources. 

• Air Pollution Management: Review of air quality controls, emissions reduction strategies, and compliance with national and international standards. 

• Climate Risk and Opportunity Management: Strategic guidance on MMG’s Climate Resilience and Decarbonisation Strategy, including scenario analysis, emissions targets, and alignment with global frameworks such as TCFD and IFRS S2. 

• Water Resources Management: Oversight of water stewardship practices, including freshwater withdrawal targets, recycling initiatives, and catchment-level planning. 

• Energy Management: Monitoring of energy efficiency programs, renewable energy adoption, and integration of energy performance into operational planning. 

• Biodiversity Management: Review of MMG’s Nature Strategy and biodiversity protection measures, including rehabilitation, habitat restoration, and alignment with the Taskforce on Nature-related Financial Disclosures (TNFD). 

The Board ensures that environmental risks and opportunities are integrated into MMG’s enterprise risk management framework and that performance is transparently disclosed through externally assured ESG reporting.