The concept of Zero Landfill is a pivotal component in contemporary waste management and environmental sustainability strategies. This chapter introduces the Zero Landfill philosophy, which aims to eliminate landfill use through comprehensive waste reduction, reuse, recycling, and recovery practices. It explores the historical context and evolution of waste management, highlighting the environmental and economic challenges posed by traditional landfill methods. The chapter delineates the principles of Zero Landfill, emphasizing the hierarchy of waste management: reduce, reuse, recycle, and recover. Key case studies and successful implementations worldwide illustrate the practical applications and benefits of Zero Landfill initiatives. Moreover, the chapter examines the roles of policy, technology, and community engagement in achieving Zero Landfill goals. Challenges, such as technological limitations, economic considerations, and behavioral changes, are discussed, providing a balanced view of the pathway to Zero Landfill. This introduction sets the foundation for deeper exploration into specific strategies and technologies that drive the Zero Landfill movement, aiming to inspire sustainable practices and policies that contribute to a circular economy.