Weather modification, although a relatively young science, has over the years stimulated great interest within the scientific, commercial, governmental and agricultural communities. This is an extremely thorough and scholarly report prepared by the Congressional Research Service in 1978. Substantial material on almost all areas of weather modification are included and the report provides an excellent reference source. The study reviews the history, technology, activities, and a number of special aspects of the field of weather modification. Consideration is given to international, legal, economic, and ecological aspects. There are also an introductory chapter which includes a summary of issues, a chapter discussing inadvertent weather and climate modification, and a chapter summarizing recommendations from major Federal policy studies.