This book provides a comprehensive exploration of green policies essential for achieving a sustainable world. It delves into the intricate relationship between environmental governance and sustainable development, offering actionable insights and practical solutions. "Green Policies for a Sustainable World" is designed to be a definitive guide for policymakers, researchers, and practitioners dedicated to creating and implementing effective environmental policies. The book begins with an analysis of global environmental agreements such as the Paris Agreement and the role of international organizations like UNEP and IPCC in promoting green policies. It then examines renewable energy policies, energy efficiency standards, and successful case studies on renewable energy transitions. Sustainable transportation policies and urban planning for green cities are discussed, highlighting innovative infrastructure solutions. Strategies for biodiversity conservation, sustainable agriculture and forestry practices, and effective water resource management are also explored. Addressing climate change impacts through policies, carbon pricing mechanisms, and adaptation strategies for vulnerable communities is a key focus. The book also delves into waste reduction and recycling policies, circular economy principles, and successful waste management initiatives. Economic instruments such as green taxation, subsidies, environmental impact assessments, and green finance strategies are examined for their role in promoting sustainability. Challenges in policy design and implementation, stakeholder engagement, and adaptive management of green policies are discussed to provide a practical perspective on governance.