IUCN provides technical advice to help the UNESCO World Heritage Committee make informed decisions on natural heritage IUCN co-drafted the World Heritage Convention text with UNESCO in 1972 and is explicitly recognized within the Convention as the technical Advisory Body to the World Heritage Committee on natural World Heritage sites.

Our role under the Convention is threefold:
1. IUCN evaluates all natural and ‘mixed’ sites nominated for World Heritage Status, and contributes to evaluations of certain cultural landscapes.
2. IUCN monitors the state of conservation of existing World Heritage Sites.
3. IUCN contributes to capacity building, training and related initiatives, particularly at regional and field levels.

To help us maintain the highest possible standards in our work, the World Heritage Programme is guided by three fundamental principles:
1. Partnership is paramount. All our activities are carried out in partnership with other organizations and stakeholders, particularly the World Heritage Centre, the other advisory bodies to the Convention (ICOMOS and ICCROM), and State Parties.
2. Sound science is essential. One of the Union’s major strengths is its high level of scientific credibility, consistency and objectivity. We maintain this by drawing on the expertise of our scientific networks – particularly the WCPA and UNEP WCMC.
3. Problems require practical solutions. An important part of our work is to identify threats to World Heritage sites, but we aim to go beyond mere reporting to seeking practical and innovative solutions to address these threats.

Source : programme patrimoine mondial de l’UICN