This publication is one of a series of information booklets for the general public published by The United States Atomic Energy Commission. Among the topics discussed are: Importance of Fusion Energy; Conditions for Nuclear Fusion; Thermonuclear Reactions in Plasmas; Plasma Confinement by Magnetic Fields; Experiments With Plasmas; High-Temperature Plasma Studies; Nuclear Fusion Reactors With Magnetic Confinement; Inertial Confinement; and Nuclear Fusion Research Programs. A reading list and free-loan film list are included. Schools and public libraries may obtain the booklets without charge. (BT)