The book, “Machine Learning for Ecological Sustainability”, establishes and explores the vital intersection between global ecological crises and advanced artificial intelligence. It begins by asserting that environmental sustainability is an urgent global imperative, detailing the systemic threats posed by climate change, pervasive pollution, rapid biodiversity loss, and unsustainable resource depletion. The book emphasizes that these challenges are not isolated problems, but symptoms of a deeper imbalance that requires a fundamental paradigm shift in thinking and action, as traditional methods alone are insufficient to address their scale and interconnectedness. The core argument then pivots to highlight the pivotal role of technology, specifically Machine Learning (ML), as the necessary transformative force. ML is defined as a data-driven approach that allows computers to learn complex patterns without explicit programming, positioning it as an ideal engine for environmental good. To lay the technical groundwork, the foundational concepts of ML—including datasets, features, algorithms, and models across supervised, unsupervised, and reinforcement learning paradigms—are clearly introduced. Ultimately, the book's purpose is to demonstrate that ML's capabilities in enhanced accuracy, accelerated analysis, and powerful prediction are indispensable tools for effectively monitoring, understanding, and protecting our planet's complex and fragile ecosystems. It positions ML as a key enabler for a more resilient and environmentally responsible future. I owe a deep debt of gratitude to TechScholastic Press, Bengaluru, for their unwavering dedication and the critical role they played in the publication of this work. Many Thanks, Jayaramu M