There are several carbon credit providers that offer verified and certified carbon credits to individuals, organizations, and companies. These providers facilitate the purchase and use of carbon credits for offsetting greenhouse gas emissions. Here are some well-known carbon credit providers:

1. The Gold Standard: The Gold Standard is a globally recognized standard for carbon offset projects. They certify projects that contribute to sustainable development while reducing greenhouse gas emissions. The Gold Standard offers carbon credits from a range of sectors, including renewable energy, energy efficiency, and afforestation.
2. Verified Carbon Standard (VCS): The Verified Carbon Standard is one of the most widely used standards for certifying carbon credits. They provide rigorous criteria for projects that aim to reduce emissions or remove carbon dioxide from the atmosphere. VCS offers a variety of project types, such as renewable energy, forestry, and methane capture.
3. American Carbon Registry (ACR): The American Carbon Registry is a leading carbon offset program in the United States. They provide third-party verification and registration of carbon offset projects across various sectors, including renewable energy, methane capture, and reforestation.
4. Climate Action Reserve: The Climate Action Reserve is an offset program that focuses on projects in North America. They provide the certification and registration of projects that reduce greenhouse gas emissions or enhance carbon sequestration. Their project types include forestry, agriculture, renewable energy, and more.
5. Clean Development Mechanism (CDM): The Clean Development Mechanism is a global carbon offset program under the United Nations Framework Convention on Climate Change (UNFCCC). It certifies projects in developing countries that contribute to sustainable development while reducing emissions. CDM credits, known as Certified Emission Reductions (CERs), can be used for offsetting purposes.
6. Carbonfund.org: Carbonfund.org is a non-profit organization that offers carbon offsetting solutions for individuals and businesses. They support a range of carbon reduction projects, including renewable energy, energy efficiency, and reforestation. Carbonfund.org provides options for calculating and offsetting carbon footprints.
7. Natural Capital Partners: Natural Capital Partners is a global provider of carbon offset and sustainability solutions. They work with organizations to develop customized carbon reduction strategies and offer a portfolio of certified carbon credits from projects worldwide.

When selecting a carbon credit provider, it’s important to consider factors such as the credibility and transparency of their certification process, the types of projects they support, and the standards they adhere to. It’s advisable to choose providers that offer verified credits, provide clear documentation, and undergo independent auditing to ensure the integrity of the credits being purchased.