The"Global Forest Resources Assessment 2000" (FRA 2000) was the most comprehensive since FAO first reported on forest resources 50 years ago. FRA 2000 was based on the bottom-up approach, but supplemented by global level verification. The backbone of FRA 2000 was the data, information and knowledge provided by countries. Country information was verified and supplemented with "top-down" studies and remote sensing analysis using the latest technology. Countries were then invited to review and comment on the outcome of the combined global analysis. Partnerships were formed with leading institutions of particular importance is the United Nations Economic Commission for Europe served as the focal point for information about industrialized countries. This publication constitutes the principal report of FRA 2000.