The book examines the sustainability of tall buildings by addressing the critical challenges they pose, and the strategic responses required to achieve environmentally responsible development. It calls for a fundamental rethinking of how tall buildings are conceived, designed, and constructed. Rather than treating sustainability as an afterthought or a collection of incremental enhancements, the book advocates for an integrated, systemic approach-one that redefines the very foundation of tall building design. At the core of this approach is the concept of Biomimetic Structural Form (B-SF), a groundbreaking design paradigm that applies lessons from natural systems to enhance the structural, functional, and environmental performance of tall buildings. B-SF recognizes structural form as the essential component of skyscraper design-supporting loads, housing functions, and shaping identity. Central to this new approach is the concept of learning from nature, positioning biomimicry not just as inspiration, but as a strategic framework for innovation. By offering a clear roadmap for reimagining tall buildings through this lens, the book introduces a bold new paradigm-one that aligns architectural and engineering excellence with environmental responsibility. It envisions a future where tall buildings are not only viable but vital to sustainable urban growth, particularly in rapidly expanding global cities.