As the global transition to renewable energy accelerates, demand for transition minerals is surging. Their extraction and processing entail significant environmental costs and potential social ripple effects, posing a shared challenge for global climate governance. From an ecological perspective, this report systematically reviews the environmental impacts across the transition mineral lifecycle. It also examines how stakeholders—including governments, industry associations, supply chain leaders, and civil society—engage in environmental governance and disclosure. Finally, it offers recommendations to enhance environmental transparency across transition mineral supply chains.