Letters to the editor

I refer to the letter by Carlos M. Varsavsky in the December 1979 issue of Technology and Society and applaud his concept of examining the export or transport of hydroelectric energy by means other than the conventional electrical transmission lines. However, I am somewhat alarmed by the lack of definitive statements outlining the sociotechnical difficulties and dangers associated with schemes based on the transmission of very high powers through the atmosphere and near space using microwaves.