Carbon Capture and Sequestration

This page last reviewed March 15, 2019


Carbon capture and sequestration (CCS) is an important strategy to reduce greenhouse gas (GHG) emissions and mitigate climate change.  CCS is a process by which large amounts of carbon dioxide (CO2) are captured, compressed, transported, and sequestered.  The sequestration component of CCS includes CO2 injection into geologic formations (such as depleted oil and gas reservoirs, un-mineable coal beds, and saline formations) as well as use in industrial materials (e.g. concrete).  CCS is distinct from biological sequestration, which is typically accomplished through forest and soil conservation practices that enhance the storage of carbon (such as restoring forests, wetlands, and grasslands) or reduce CO2 emissions (such as reducing agricultural tillage and suppressing wildfires).

ARB is currently developing a quantification methodology for CCS.  As with other quantification methodologies, the CCS quantification methodology may be adopted for use in the Cap-and-Trade and Low Carbon Fuel Standard programs as determined appropriate in rulemaking(s) specific to these programs.  Studies by the Intergovernmental Panel on Climate Change (IPCC) and the California Council on Science and Technology (CCST), have shown that CCS has the potential to reduce carbon emissions by millions of metric tons, and may be an integral part of meeting California’s long term climate goals.  CCS allows for existing fossil resources, such as natural gas, to be used in a way that is much lower in carbon emissions than traditional methods.

What's New

CARB has adopted a CCS protocol under the Low Carbon Fuels Standard (LCFS), describing the requirements that CCS projects must meet in order to generate LCFS credits. The CCS protocol is available here.

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