Report of the Subsidiary Body for Scientific and Technological Advice on its eighteenth session, held at Bonn, from 4 to 13 June 2003. Addendum. Methodological issues. Land use, land-use change and forestry: Definitions and modalities for including afforestation and reforestation activities under Article 12 of the Kyoto Protocol (Agenda item 4 (d)). Modalities and procedures for afforestation and reforestation project activities under the clean development mechanism (in the first commitment period).