The Eco-Innovation Challenge seeks innovative solutions to tackle pollution sources such as agricultural runoff, municipal wastewater, industrial chemicals, and marine litter affecting the Black Sea. Innovators from eligible countries may apply through two windows: a Focus Country Window (Georgia, Moldova, Türkiye) for deployment-ready interventions (grants of US$50 thousand to US$300 thousand) and a Greater Black Sea Window for earlier-stage ideas (technical assistance up to US$20 thousand). The deadline for expressions of interest is 14 November 2025. Eco-Innovation Challenge