Green banking is a new trend, deserves more attention. Understanding green banking, its nature, importance, impact on spreading green, its link to sustainable development goals (SDGs). Green Banking is an umbrella term referring to practices and guidelines that make banks sustainable in the economic, environmental, and social dimensions. It aims to make banking processes and the use of IT and physical infrastructure as efficient and effective as possible, with zero or minimal impact on the environment. This concept is mutually beneficial to the banks, industries and the economy. It helps in promoting environmental-friendly practices and reducing carbon footprints from banking activities. It aims to improve the operations and technology and make the clients' habits environment-friendly in the banking business. It is like normal banking and the consideration for social and environmental factors for protecting the environment.This has motivated the authors to prepare a comprehensive handbook on the cutting-edge topic to make it popularise to the new generation and make the vision of Green Banking a successful one. Authors have made an effort to accommodate all forms of literature, analytical examples, and most importantly, present status quo, which shall benefit the reader to understand the topic better and trigger their capabilities to contribute significant innovation in the near future to have a better future sustainable global fintech infrastructure.