This chapter examines the carbon footprint linked to denim production, highlighting its considerable environmental effects from raw material acquisition to final disposal. It discusses the principal sources of greenhouse gas emissions within the denim supply chain, encompassing cotton agriculture, energy-intensive processing, and consumer behaviors such as frequent washing and drying. The discourse encompasses both direct and indirect emissions, including life cycle assessment (LCA) tools to measure environmental impacts at every stage of production. It also emphasizes industry initiatives to mitigate carbon emissions through the adoption of organic cotton, sustainable manufacturing practices, and carbon credit systems. Case studies, challenges, and optimal manufacturing processes are provided to demonstrate effective methods for reducing the carbon footprint of denim. The chapter emphasizes the imperative of sustainable technologies and educated customer behaviors to foster environmental accountability in the global denim sector.