Geological sequestration is a process that captures and stores carbon dioxide (CO2) emissions underground to prevent them from entering the atmosphere. This technique is often used in conjunction with carbon capture and storage (CCS) technologies, which capture CO2 from sources like power plants before it can contribute to climate change. The captured CO2 is injected into deep geological formations, such as depleted oil and gas fields or deep saline aquifers, where it can be safely contained. This method not only helps reduce greenhouse gas emissions but also has the potential to enhance oil recovery in certain cases, making it a valuable tool in the fight against global warming.