This policy brief explores innovative approaches to mobilizing climate finance, focusing on both public and private sector contributions. It highlights the urgent need for scalable finance solutions, given global economic volatility and rising debt levels in developing countries. Key solutions include unlocking alternative funding sources, leveraging debt restructuring, scaling blended finance, and utilizing innovative financial instruments. The Green Climate Fund (GCF) plays a critical role in catalyzing such investments and driving climate action, particularly in support of the most vulnerable.