The California Carbon Dioxide Storage Agreement (CSA) is a legal framework designed to regulate and promote the storage of carbon dioxide (CO2) in underground geological formations within California. This agreement allows the state to address CO2 emissions from various sectors, such as power plants and industrial facilities, by providing a mechanism for their safe and effective capture and storage. Under the CSA, facility operators are required to obtain a storage agreement with the relevant regulatory authorities before commencing CO2 injection activities. This agreement ensures compliance with all necessary permits, regulations, and reporting requirements to guarantee the storage process adheres to environmental standards and public safety. There are three primary types of California Carbon Dioxide Storage Agreements: 1. Geologic Storage Agreement (GSA): This type of agreement pertains to the storage of CO2 in underground geological formations, such as deep saline aquifers, depleted oil and gas fields, or unsinkable coal seams. These geological formations act as natural reservoirs, effectively trapping and storing the CO2, preventing it from being released into the atmosphere. 2. Complementary Storage Agreement (CSA): The CSA is intended for projects that involve the use of CO2 for enhanced oil recovery (FOR) operations. FOR employs CO2 injection to enhance petroleum extraction from aging oil fields, while simultaneously storing the injected CO2 underground. 3. Enhanced Mineralization Agreement (EMA): This agreement focuses on a novel technique called enhanced mineralization, wherein captured CO2 is converted into solid carbonate minerals through chemical reactions with certain types of rock formations. This process not only securely stores CO2 but also permanently transforms it into a stable and inert form. These various types of CCAS aim to provide a comprehensive regulatory framework that supports the reduction of greenhouse gas emissions, promotes the development of clean energy technologies, and advances the sustainability goals of the state of California. By enabling the safe storage of CO2, the CSA plays a crucial role in mitigating climate change and transitioning towards a low-carbon future.