Volume 1 of this document is to provide an abstract of the more technically explicit information contained in Volume 2 concerning the preliminary assessment of the impact of the SPS on the environment ... In the SPS microwave health and ecology program two types of studies must be combined ... Principal among these are the effects of continuous low-level exposure on humans and short-term high-level exposures on airborne biota ... A major effort must be made to validate the apparently credible published reports of potential adverse health effects of the 2.45GHz radiation transmitted from the satellite to the rectenna ... a number of other health and safety effects can the anticipated from the deployment of an SPS. These result from: Mining of raw materials, Construction of terrestrial facilities, Processing and fabrication of finished materials, Transport of materials and equipment, Ground station operation, Space launch and recovery, Orbital transfer of materials and personnel.