Climate change, driven significantly by greenhouse gas (GHG) emissions, is a critical global challenge. Companies, as major contributors to these emissions, play a pivotal role in addressing this issue. Introducing a systematic process of GHG accounting is essential for organizations to measure, manage, and reduce their carbon footprint. This paper explains the various steps involved in the GHG accounting process, including setting boundaries, data collection, selecting suitable methodologies, and emissions calculation. Accurately calculating GHG emissions is a complex and multifaceted process. This research paper delves into the several challenges faced by the organization in measuring and disclosing the emissions and also categorized into data challenges and process challenges. It also explores the role of technology in enhancing data accuracy and the benefits of engaging suppliers in the GHG quantification process. Strategies for continuous improvement, such as regular audits, training programs, and integrating advanced data management systems, are also examined. These measures are crucial for improving the maturity and effectiveness of GHG accounting practices, ensuring organizations can contribute effectively to climate change mitigation and achieve their sustainability goals.