Berkeley Carbon Trading Project's Voluntary Registry Offsets Database contains all carbon offset projects listed globally by four major voluntary offset project registries: American Carbon Registry (ACR), Climate Action Reserve (CAR), Gold Standard, and Verra (VCS). These four registries generate almost all the world's voluntary market offsets and include projects eligible for use under the California, Quebec, and Washington cap-and-trade programs as well as UN Clean Development Mechanism projects that transitioned into one of the voluntary registries.Â
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Breakdown of VCM offsets issued worldwide 2025, by type
As of April 30, 2025, almost ** percent of the *** billion voluntary carbon offsets that had been issued by major registries worldwide went toward forestry and land use projects. The majority of credits issued from within this category involve protecting tropical forests from deforestation and degradation in developing countries, known as REDD+ (Reducing Emissions from Deforestation and Forest Degradation). Renewable energy projects, such as wind and hydropower, accounted for the second-largest share of VCM credit issuances.
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UC Berkeley (Richard & Rhoda Goldman School of Public Policy). (July 2, 2025). Distribution of total voluntary carbon credits issued worldwide by leading standards and registries as of April 2025, by type [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/1478059/vcm-offsets-issued-shares-by-type/
UC Berkeley (Richard & Rhoda Goldman School of Public Policy). "Distribution of total voluntary carbon credits issued worldwide by leading standards and registries as of April 2025, by type." Chart. July 2, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/1478059/vcm-offsets-issued-shares-by-type/
UC Berkeley (Richard & Rhoda Goldman School of Public Policy). (2025). Distribution of total voluntary carbon credits issued worldwide by leading standards and registries as of April 2025, by type. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/1478059/vcm-offsets-issued-shares-by-type/
UC Berkeley (Richard & Rhoda Goldman School of Public Policy). "Distribution of Total Voluntary Carbon Credits Issued Worldwide by Leading Standards and Registries as of April 2025, by Type." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 2 Jul 2025, /statistics/1478059/vcm-offsets-issued-shares-by-type/
UC Berkeley (Richard & Rhoda Goldman School of Public Policy), Distribution of total voluntary carbon credits issued worldwide by leading standards and registries as of April 2025, by type ÌÇÐÄÆƽâ°æ, /statistics/1478059/vcm-offsets-issued-shares-by-type/ (last visited July 21, 2026)
Distribution of total voluntary carbon credits issued worldwide by leading standards and registries as of April 2025, by type [Graph], UC Berkeley (Richard & Rhoda Goldman School of Public Policy), July 2, 2025. [Online]. Available: /statistics/1478059/vcm-offsets-issued-shares-by-type/
