The Nexus approach stems from the realization that water, energy, agriculture and natural ecosystems exhibit strong interlinkages, and that under a traditional sectoral approach, attempting to achieve resource security independently often endangers sustainability and security in one or more of the other sectors.

REXUS is an innovative and experimental project that, through a multitude of approaches, aims to improve the understanding of the Nexus interactions between Water, Energy, Food and Climate (WEFC) as a framework for resource security and sustainable development.