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 approachone 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 designsupporting 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 paradigmone 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.