The chapter examines the creative use of blockchain and digital twin technologies in green finance that combines financial innovation with environmental sustainability. Blockchain and digital twin technologies are transforming traditional financial frameworks, making novel financial instruments essential for green investments. ESG-linked futures, green bonds, and sustainable asset-backed securities have evolved over time, and blockchain technology and digital twins have made them more reliable and appealing. The chapter also examines minimising the risks and improving return prediction in green investments. These technologies are shown in action in sustainable finance using real-world scenarios. The chapter concludes with a discussion of the challenges and potential advances of these revolutionary financial instruments and their growing relevance in environmentally friendly financial solutions. This comprehensive investigation aims to help financial professionals, investors, politicians, and academics navigate the ever-changing world of green investing.