This document was prepared in order to provide relevant technical background information to inform the consideration by the Subsidiary Body for Scientific and Technological Advice, in response to decision 3/CMP.6, paragraph 30, of a materiality standard under the clean development mechanism. It is based on information contained in submissions from Parties, intergovernmental organizations and admitted observer organizations, contained in document FCCC/SBSTA/2011/MISC.2 and posted on the UNFCCC website, as well as on information from other greenhouse gas related schemes