今年的主题为“以水促和平”（“Leveraging water for peace”），以强调将水作为一种和平工具，提高人们对世界如何团结一致、围绕水的可持续管理来防止争端和合作应对共同挑战的认识。
参考资料：
https://www.unwater.org/water-facts
https://www.nature.org/en-us/what-we-do/our-insights/perspectives/nicole-silk-freshwater-cop15/
https://www.nature.org/en-us/about-us/where-we-work/africa/stories-in-africa/nature-based-solutions-could-protect-cape-town-s-water-supply/
