CO2 emissions refer to the release of carbon dioxide gas into the atmosphere as a result of human activities, such as burning fossil fuels, industrial processes, and land use changes. These emissions are a major contributor to climate change and global warming, as CO2 is a greenhouse gas that traps heat in the Earth's atmosphere. Research in this area seeks to understand the sources and effects of CO2 emissions, develop strategies to reduce emissions, and mitigate the impact of these emissions on the environment and human health. This research is crucial for informing policy decisions and implementing measures to address climate change.