Limiting the growth of technology throughout history man has cchanged his physical environment to improve his way of life.With the tools of technology man has altered many physicall features of the earth. He has transformedwood lands into farmland: He has modified the face of the earth by cutting through mountains to build roads and railways. However these changes in the physical environment have not always had beneficial results. Today, pollution of the planet. Each day, thousandes of tons of gases come out of the vehicles: smoke from factories pollutes the aire of industrialized areas and the surrounding countryside. The air in cities is becoming increasingly unhealthy. The pollution of water is equally harmful. In the sea, pollution from oil is killing a lot of sea plant and fish. It is now necessary for man to limit the growth of technology in order to survive on the earth.