The book "Uncertainties in Greenhouse Gas Inventories" offers a comprehensive analysis of the uncertainties involved in estimating greenhouse gas emissions. It is based on the findings from the 3rd International Workshop on Uncertainty in Greenhouse Gas Inventories, which took place in 2010. This work summarizes 16 significant contributions that address the challenges and solutions related to uncertainties in national inventories. The authors, including experts from various institutions, discuss approaches to improving the accuracy and reliability of emissions data. The book aims to deepen the understanding of the complexity of emissions estimates and highlight the relevance of these uncertainties for policy decisions and global monitoring frameworks. It serves as a valuable reference for professionals engaged in climate science, environmental policy, and sustainable development.