Metropolitan areas, as a group, have had the greatest increase in population from 1960 to 1965. One of the major factors of growth has been the in-migration of people from rural parts of the country. One problem created by the influx of people into the cities has been the growth of the ghetto. Conditions of the ghetto, such as overcrowding and poor sanitation facilities, are a contributing factor to riots, although not the primary cause. The Negro population, which accounts for most of the ghettos, has also increased in the urban areas from 12% in 1950 to 20% in 1965. A solution to the plight of the city is the idea of "new communities." These communities would have a pre-determined population figure and would make land available for industry or would be accessible to industry. Another solution would be the overhaul of land use regulations and a more effective system to control and guide developers. In conclusion, a national policy to deal with urban growth would be desirable in order to provide the cities with a framework in which to work more effectively in solving their growth problems. (RH)