The Congress finds that rapid changes in patterns of urban settlement, including change in population distribution and economic bases of urban areas, have created an imbalance between the Nation’s needs and resources and seriously threaten our physical and social environment, and the financial viability of our cities, and that the economic and social development of the Nation, the proper conservation of our energy and other natural resources, and the achievement of satisfactory living standards depend upon the sound, orderly, and more balanced development of all areas of the Nation.