Atmospheric CO2 research focuses on studying the concentration of carbon dioxide in Earth's atmosphere and its effect on climate change. Scientists measure CO2 levels using a variety of methods, such as direct sampling, remote sensing, and ice core analysis. Research in this area aims to understand the sources and sinks of CO2, the impact of human activities on increasing CO2 concentrations, and the feedback mechanisms that may exacerbate global warming. Studies also investigate potential mitigation strategies, such as carbon sequestration and emissions reduction, to address the challenge of rising atmospheric CO2 levels.