It is the conversion, directly induced by humans, of unforested land into forested land through planting, sowing and/or human-induced promotion of natural seed sources, in an area that has been forested but converted into non-forested land.
For the first commitment period of the Kyoto Protocol, reforestation activities were limited to reforestation occurring on lands that did not contain forests on December 31, 1989 (the definition used for land-use, land-use change, and forestry activities under Article 3, paragraphs 3 and 4 of the Kyoto Protocol).