This line will have the strategic objective of providing partner countries with knowledge and methods for assessing biodiversity and adapted ecosystem services.

The OSS is accredited as a Regional Implementation Agency for the Adaptation Fund (2013) and for the Green Climate Fund (2017). In this context, the Organization has contributed to improving countries' access to Climate Finance through (i) setting up and financing adaptation and mitigation projects and (ii) strengthening their institutional capacities, and their governance mechanisms.

The Water line will have the strategic objective of contributing to meeting the water needs of the populations in the OSS member states and to the sustainable management of these resources by putting water on top of the international political agendas.

As part of its new Strategy, the OSS will work within the framework of the United Nations Decade (2021-2030) for the Restoration of Ecosystems and will align itself with the 2018-2030 UNCCD Strategic Framework and the future post-2020 Biodiversity Global Framework. In particular, it will provide decision-makers and development stakeholders with useful tools for decision-making in the areas of mitigating the negative effects of desertification and land degradation, forecasting and contending with the drought impacts.