The International Union for Conservation of Nature (IUCN) is an international organization dedicated to finding pragmatic solutions to our most pressing environment and development challenges. The organization publishes the IUCN Red List, compiling information from a network of conservation organizations to rate which species are most endangered. The IUCN supports scientific research, manages field projects all over the world and brings governments, non-government organizations, United Nations agencies, companies and local communities together to develop and implement policy, laws and best practice. IUCN is the world's oldest and largest global environmental network-a democratic membership union with more than 1,000 government and NGO member organizations, and almost 11,000 volunteer scientists in more than 160 countries. IUCN's work is supported by more than 1,000 professional staff in 60 offices and hundreds of partners in public, NGO and private sectors around the world. The Union's headquarters are located in Gland, near Geneva, Switzerland. IUCN has one of the world's most comprehensive ranges of authoritative publications, reports, guidelines and databases for conservation and sustainable development. They publish or co-author more than 150 books and major assessments every year, along with hundreds of other reports, documents and guidelines.