Weather Modification (Cloud Seeding) is a technology, which helps in disaster management. The technology of weather modification is being developed in different countries. The book addresses issues related to inadequacy of knowledge on state of art of the technology, incomplete framework for design, planning and analysis of experiment and implementation and institutional constraints. The chapters are designed so as to provide the basic issues related to climate and the context for cloud seeding, the technologies and or tools needed for weather modification. The planning, design, execution and evaluation are also included in the book. While we are to be modest, it is brought to the notice of the reader that this book attempts to provide a wide coverage of the topics related to cloud seeding. The extent of coverage of each topic varies depending upon the state of art of the development. As you read the pages of the publication meant for student, research worker or a practicing cloud seeding professional, you will discover that the issues shall refresh and give ideas and techniques to understand and improve the operations of cloud seeding.