American's genius with high technology may have put men on the moon, but there is growing doubt about its ability to solve human problems closer to home. In fact, a slight but significant change from purely technological solutions is already under way as scientists insist that answers to the world's problems will not come from an attractive exhibition of electronics and machines. Instead, as they see it, solutions must develop from a better understanding of the humans that drive the system and from a fuller appreciation of the limits and potential  of the earth's resources. What this means is an increased emphasis on the life and earth sciences, on sociology, psychology, economics and even philosophy. More and more of the best minds in science, particularly young researchers, are being drawn into these developing fields. All this is not to say that technological creativity will not play a critical role in solving energy and food shortages, or that answers to environmental difficulties will not come from further advances in the same technologies that may have helped cause the problems. Where the real challenge lies, in the view of the new generation of scientists, is in finding ways to produce goods and meet the world's needs, using less of the raw materials that are becoming short. The author states all the following CXCEPT that   _  .
the development of present techniques cannot provide any answers to today's problems. an increasing number of young scientists are taking a great interest in biological and social sciences. many scientists have come to understand the limits of natural resources. many scientists argue that high technology is something but not everything.