ABSTRACT:The impacts of climate change on our planet are severe, and it is crucial for society to take transformative measures towards a sustainable future. One such measure is the CBAM, which this master's thesis focuses on. The research investigates the challenges and opportunities of collecting emissions data within the global supply chain, particularly at the supplier level. The study aims to improve data collection processes in various sectors and industries.The research approach combines a literature review with empirical investigations, including semi-structured interviews with key stakeholders and secondary data from country documents submitted to the UNFCCC to achieve this. Encouraging communication, knowledge sharing, and education can promote sustainable practices and emissions reduction in the supply chain. Overcoming obstacles such as technological advancements, research and development, capacity building, cultural barriers, and transparency is crucial.The regulatory framework, stakeholder engagement, organisational practices and technological infrastructure are key to collecting emissions data. This study offers policymakers, practitioners, and stakeholders’ insights on improving transparency and data collection. Knowledge transfer, communication, and investment in new frameworks are essential for data analysis in the global supply chain.This research aims to create a sustainable and transparent supply chain to combat climate change and promote a low-carbon future. It provides insight into the challenges and opportunities of collecting emissions data in the global supply chain, contributing to the knowledge of sustainable practices and transitioning to an environmentally responsible global economy. It's a valuable resource for anyone interested in sustainable practices in the global supply chain.