The Global Environment Facility (GEF) Small Grants Programme invites civil society organizations to apply for the CSO Challenge Program, which supports the scaling and replication of proven environmental solutions that generate global environmental benefits while strengthening local communities. Eligible applicants are civil society organizations with successful initiatives that align with one of five priority areas: community-based management of threatened ecosystems and species; sustainable agriculture or fisheries and food security; low-carbon energy access; chemicals and waste management; or sustainable urban solutions. The program provides grants of up to US$300 thousand. The first call is open to civil society organizations in Eastern Europe, the Caucasus, and Central Asia. The application deadline is 31 July 2026. Small Grants Program