Who Trusts Us
As a Rockefeller family institution, American Carbon Registry focuses on sound science, environmental rigor and making an impact. For this reason, governments, corporations and NGOs trust us to ensure the integrity of carbon offsets. Read testimonials from our partners and clients to learn more.
California carbon market
ACR operates as an Air Resources Board-approved compliance Offset Project Registry and Early Action Offset Program for the California carbon market, the first economy-wide cap-and-trade program in the U.S. and one of the largest regulated carbon markets in the world.
Voluntary carbon market
ACR is recognized by the following widely respected organizations whose objective is to ensure offset quality in the voluntary carbon market.
ACR is approved by the International Carbon Reduction and Offset Alliance (ICROA) as an Offsetting Standard. ICROA is a not-for-profit alliance of leading carbon reduction and offset providers that provides leadership and a unified voice advocating for rigorous industry standards for the voluntary carbon market. ICROA members support a reduce-and-offset approach to carbon management, and they all comply with the ICROA Code of Best Practice. The Code gives consumers confidence that companies are operating to robust procedures and that implemented carbon strategies are credible and emissions reductions are real, measureable, permanent, and independently verified – a step to the goal of reducing global greenhouse gas (GHG) emissions. ICROA members include Carbon Clear, ClimateCare, ClimaCount, Climate Friendly, Climate Neutral Group, co2balance, EcoAct, First Climate, targetneutral and The CarbonNeutral Company.
ICROA is run by the International Emission Trading Association (IETA), the leading voice of the business community on the subject of carbon markets since 2000. IETA's 160 member companies include some of the world's leading corporations, including global leaders in oil, electricity, cement, aluminum, chemical, paper, and other industrial sectors; as well as leading firms in the data verification and certification, brokering and trading, legal, finance, and consulting industries.
ACR is a Green-e Climate Endorsed Program. A program of Center for Resource Solutions, Green‑e is North America's leading independent consumer protection program for the sale of renewable energy and greenhouse gas reductions in the retail market. Green‑e offers certification and verification of renewable energy and greenhouse gas mitigation products through Green‑e Energy, a renewable energy certification program; Green‑e Climate, a greenhouse gas emission reduction certification program; and Green‑e Marketplace, a program that provides forward-thinking organizations a simple, nationally recognized logo they can use to communicate their renewable energy and climate commitment to their customers and shareholders.
