When purchasing carbon offsets that have been issued by the Climate Action Reserve, the unit of measurement is the CRT (Climate Reserve Tonne), which represents one metric ton of carbon dioxide equivalent emissions reduction or sequestration (CO2e). CRTs are well-respected as being among the highest quality offsets available. They meet the criteria of being real, permanent, additional, verifiable and enforceable. This means CRT buyers can be confident that the offsets they purchase provide true and credible benefit to the environment. This page is meant to be a resource to those who are interested in finding ways to buy, sell, or retire CRTs.

The list is organized into categories based on the type of transaction. The Climate Action Reserve makes no guarantees or warranties regarding the services provided by these organizations. Inclusion on this list does not signify any sort of official certification by the Reserve. Companies are listed alphabetically and may appear in more than one category. If your organization is interested in appearing on this page or you have any concerns regarding any of the below organizations, please contact Scott Hernandez at shernandez@climateactionreserve.org or (213) 542-0295.

CRTs are not an appropriate investment for individual investors. Click here for more information.