Green finance is increasingly recognized as a tool for advancing sustainable development through the alignment of financial systems with environmental exigencies. Adopting a conceptual and analytical approach, this chapter explores how green finance contributes to economic growth while simultaneously addressing climate change and environmental sustainability. Deploying key financial instruments such as green credit lines, green bonds, impact investing funds, and climate-oriented investments, it assesses green finance usefulness in channelling capital towards sustainable programmes. Also, it considers policy frameworks and regulatory mechanisms underpinning green financing, while emphasizing the central role of financial institutions in embedding environmental, social, and governance (ESG) into investment decisions, especially in emerging markets. Challenges noted include inadequate market incentives, regulatory gaps, and complexities of risk assessments. Findings indicate that integrating green finance into conventional financial models, supporting stronger public–private partnerships, and financial innovations are critical in driving change towards low-carbon and sustainable economies in Sub-Saharan Africa.