This study provides a comprehensive examination of the fluctuations in CH4 emissions from wetlands across the European Union (EU) over a specific timeframe from (1990-2020) and a projected period from (2020-2040). The study employs statistical techniques such as Mann-Kendall Analysis, Sen's Slope estimation, Tukey Test comparisons, and Principal Component Analysis to evaluate trends, magnitudes, and patterns of CH4 emissions, along with constructed bibliometric network using VOSviewer tool.