International Nitrogen Assessment

Funded by UNEP/GEF, the International Nitrogen Assessment (INA) is currently under preparation and set for publication by Cambridge University Press in 2026.

With approx 350 authors, 12 editors and 28 chapters spread across 5 parts, the INA will be a showcase for multi-stakeholder engagement, internationally relevant science and the benefits of a collaborative and diverse approach to solving the nitrogen challenge. 

 The INA will be organized into 5 parts:

  1. The global nitrogen challenge: Problem definition

  2. Foundations for assessing the nitrogen cycle

  3. Global integrated assessment across the nitrogen cycle

  4. Nitrogen challenges and opportunities for key world regions

  5. Grasping the future challenge

The INA was formally welcomed by UN Member States at UNEA 5.2 in 2022. As a result, its high-profile publication will directly support the implementation of the second Resolution on Sustainable Nitrogen Management (UNEP/EA.5/Res.2).