https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-1-understand-and-beat-marine-pollution/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-2-protect-and-restore-ecosystems-and-biodiversity/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-3-sustainably-feed-the-global-population/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-4-develop-a-sustainable-and-equitable-ocean-economy/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-5-unlock-ocean-based-solutions-to-climate-change/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-6-increase-community-resilience-to-ocean-hazards/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-7-expand-the-global-ocean-observing-system/ 2026-10-15T14:33:34+00:00 https://www.eu4oceanobs.eu/un-ocean-decade-challenge/challenge-9-skills-knowledge-and-technology-for-all/ 2026-10-15T14:33:34+00:00