GreenCert is a framework that enables quantification, verification, analysis of uncertainty and audit and compliance reporting for GHG-related risks and measures including greenhouse gas reductions, removals, avoidance and carbon offsets. While there are several organizations around the globe that have some form of carbon calculator or monitoring tool, GreenCert is different: more comprehensive, more scientific, more scalable, and more accurate. The system registers carbon sources, ingests all GHG-relevant data provided by clients or sensors at client locations, and ensures the data chain of custody. GreenCert will calculate the GHG baseline footprint and any GHG emission reductions/removals/avoidance, and outputs the measurements in various views and reports. The outputs are transparent, easily verifiable, reproducible and scientifically defensible.