Every human being, no matter what he is doing, gives off body heat. The usual problem is how to dispose of it. But the designers of the Johnstown campus of the University of Pittsburgh set themselves about the 51 problem ------how to collect body heat. They have designed a collection system which utilizes not only body heat, but the heat given off by such objects as light bulbs and refrigerators as well. The system works so well 52 no conventional fuel is needed to make the campus’ six buildings comfortable.
Some parts of the buildings ------ theatres and offices 53 classrooms ------ are more than amply heated by people and lights and sometimes must be air-conditioned 54 in winter. The technique of 55 heat and redistributing it is 56 “Heat recovery”. A few modern buildings recover __57__, but the university’s system is the first to recover heat 58 some buildings and reuse it in 59 . Along the way, Pitt has learned a great deal about some of its heat producers. The 60 a student studies, the more heat his body 61 . Male students emit more heat than 62 students. And the larger a student, the more heat he 63 . It is tempting to 64 that the hottest prospect for the Johnstown campus would be a 65 , overweight male genius.