Countries seeking to scale up renewables can draw on the bond market, including the growing range of securities dedicated to sustainable, environmentally beneficial, climate-safe project finance. Renewable energy has emerged as a major recipient of such green bond proceeds. This brief from the International Renewable Energy Agency (IRENA) highlights enormous growth potential for sustainable energy offerings through the green bond market. As the world focuses on decarbonising energy use, green bonds form a key link between capital providers and renewable energy projects. An immense shift is needed in the allocation of financial capital to drive the world’s transition to a low-carbon economy. IRENA has produced concise briefs on key investment vehicles and new business models for renewable energy finance.