Carbon dioxide (CO₂) capture and storage (CCS) is a key technological approach aimed at reducing greenhouse gas emissions from industrial processes and fossil fuel-based power generation. CCS involves three main steps: capturing CO₂ at the source, transporting it usually via pipelines and securely storing it in deep geological formations such as depleted oil and gas fields or saline aquifers. This process prevents CO₂ from entering the atmosphere, thereby helping to mitigate climate change while enabling the continued use of carbon-intensive energy systems during the transition to renewables. Advanced capture methods, including pre-combustion, post-combustion, and oxy-fuel combustion, are being developed to improve efficiency and reduce costs. While CCS is not a standalone solution, it plays a crucial role in decarbonization strategies, especially for hard-to-abate sectors like cement, steel, and chemical manufacturing. Successful implementation requires supportive policy frameworks, public acceptance, and rigorous monitoring to ensure long-term storage security and environmental safety.