During December 2025, B.S. Nam delivered a comprehensive update to the GHG Methodology Documentation and Calculator within the hashgraph/guardian repository, focusing on cement production and waste disposal emissions. Leveraging skills in data analysis, documentation, and environmental science, B.S. Nam revised emission factors and calculation formulas, clarified user input data requirements, and improved formatting for enhanced readability. The work involved refactoring ten methodology files and adding detailed tables for waste types with CO2 emission factors, all authored in Markdown. These updates improved data quality and compliance readiness, supporting more reliable emissions reporting and demonstrating disciplined version control and collaborative documentation practices.