In the United States, voluntary and compliance carbon markets are being created there is an effort to match producers of carbon credits with those that would like to purchase credits. Each market has unique obligations and requirements. Farmers and those advising farmers are confused about the marketplace. The purpose of this document is to provide useful information about the voluntary and compliance markets. The target audience is farmers, crop consultants, and scientists. The document is organized into four sections, general information about the markets, answers to questions from certified crop consultants, market glossary, and requirements about specific markets. These marketplaces are rapidly evolving and will likely change as the markets mature.