This book explores the emerging field of plant molecular farming, highlighting its potential in producing biopharmaceuticals, combating diseases, and advancing sustainable agriculture. It covers diverse topics, including plant-based biopharmaceuticals, transient expression systems, antiviral plant extracts, nanogene delivery, and the role of AI in biopharmaceutical production. With contributions from leading experts, the chapters provide in-depth insights into innovative strategies and technologies shaping this field. This book is a valuable resource for researchers, academicians, and professionals in biotechnology, agriculture, and pharmaceutical sciences, as well as policymakers and students seeking to understand the future of plant-based innovations.