In addition to carbon crediting programs, there are a number of “add-on” certification schemes for carbon credits. Some of these, like the Climate, Community, & Biodiversity Standards (CCBS) or SOCIALCARBON certify the co-benefits achieved by crediting projects (but do not otherwise address credit quality). Others, like Green-e Climate, provide some checks on credit retirement/ownership for retail credit buyers (see Exclusive Claim to Avoided or Removed GHG Emissions), but otherwise, add little value beyond what carbon crediting programs already provide.