- the requirement for international frequency agreements, - international efforts to adjust to an acceptable RFI-level, - the accumulation in space of debris from SPS activities, - the potentially reduced oil or natural gas imports for the SPS-owning countries and other users of SPS’s, and - the organisation for the development and the operation of SPS’ s. 1.2.11.4 Regional and Governmental Regulation for Rectenna Siting Only one publication tries to derive such regulations from existing ones for power generating stations (78/64) . 1.2.12 Public Acceptance (References: 76/1,76/2,76/3,77/17,77/18,78/44,78/69.) 1.2.12.1 General This category implies the potential social impacts from a SPS-programme. Areas of special concern are the safety considerations and the potential implications of the microwave power transmission. Since the public acceptance of large- scale programmes become increasingly important, most authors pointed out, that the defects in public discussion and information during the planning of nuclear power plants must be avoided in planning SPS's. 1.2.12.2 Environmental Impacts by SPS and the Public A. Land Requirements 2 Land primarily required for rectenna siting (^100 km without and1000 kmz with extensive buffer zones) and for launch- and recovery sites. This is one of the most frequently referred public concerns. B. Environmental Pollution by Launch Vehicle Operations This is another subject of serious concern In the public. The large number of required launches will mainly produce high altitude emissions. This could affect the ozone layer, which is vitally necessary for life on earth. Other potential pollutions are low atmospheric emissions by booster engines, ground and water pollution by exhaust fallouts and debris, and very high noise levels near the launch and recovery sites. C. Microwave Impacts on the Ionospheric Environment The potential heating of the ionosphere by microwaves is also seriously discussed as a public concern. These effects might cause a disturbance in communication services utilising the ionosphere. However, the understanding of ionospheric impacts by the beam is very immature.
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