Aviation accounts for 2.5% of global emissions and remains one of the hardest sectors to decarbonise. Sustainable aviation fuels (SAF) are widely seen as its most immediate solution, yet production sits below 1% of global jet fuel use. In this episode, Haliru Audu, Programme Officer for Project Financing at IRENA, explores what is holding SAF back from scale, what it takes to attract serious investment, and how financial instruments and risk-sharing mechanisms such as FinInvest@ETAF can help bridge the gap between pilot projects and industrial-scale deployment.