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This guide provides strategies for Project Preparation Facilities (PPFs) to help small and intermediary cities—defined as those with 10,000 to 200,000 residents—access climate finance. It addresses critical barriers such as limited municipal capacity, small project sizes that deter investors, and poor creditworthiness, which prevents borrowing on commercial terms. The document recommends tailored PPF interventions, including specific calls for proposals, project aggregation models, blended finance, and community-based funding instruments to unlock investment for low-carbon and resilient infrastructure.