The UNESCO Chair on Sustainability at UPC contributed to the XIX World Water Congress in Marrakech (1–5 December 2025) through active engagement in the official Natural–Economy–Water (NEW) Nexus dialogue, and by co-organising a dedicated side event on AI for WEFE Nexus assessment that connected scientific innovation with practical pathways for policy and implementation, strengthening the science–policy–practice interface for more resilient and integrated water governance. T