CO2 efflux is a research area that focuses on the measurement, understanding, and modeling of carbon dioxide emissions from various sources, such as soils, forests, and bodies of water. Researchers in this field aim to quantify the amount of CO2 released into the atmosphere and identify the factors that influence these emissions, such as temperature, moisture, and land use changes. By studying CO2 efflux, scientists can better understand the carbon cycle and its impact on the global climate system. This research is important for predicting future changes in atmospheric CO2 levels, assessing the effectiveness of carbon sequestration strategies, and guiding policy decisions to mitigate climate change.