IUFRO is a non-profit, non-governmental international network of forest scientists, which promotes global cooperation in forest-related research and enhances the understanding of the ecological, economic and social aspects of forests and trees. IUFRO is "the" global network for forest science cooperation. It unites more than 15,000 scientists in around 650 Member Organizations in over 125 countries, and is a member of ICSU. Scientists cooperate in IUFRO on a voluntary basis.