It is hereby found and declared that (a) there exist in communities of this state slum, blighted, and deteriorated areas which constitute a serious and growing menace, injurious to the public health, safety, morals and welfare of the residents of the state, and the findings and declarations heretofore made in this article with respect to slum and blighted areas are hereby affirmed and restated, (b) certain slum, blighted, or deteriorated areas, or portions thereof, may require acquisition and clearance, as provided in this article, since the prevailing condition of decay may make impracticable the reclamation of the area by conservation or rehabilitation, but other areas or portions thereof may, through the means provided in this article, as amended, be susceptible of conservation or rehabilitation in such a manner that the conditions and evils hereinbefore enumerated may be eliminated, remedied or prevented, and that salvable slum and blighted areas can be conserved and rehabilitated through appropriate public action and the cooperation and voluntary action of the owners and tenants of property in such areas, and (c) all powers conferred by this article, as amended, are for public uses and purposes for which public money may be expended and such other powers exercised, and the necessity in the public interest for the provisions of this article, as amended, is hereby declared as a matter of legislative determination. A community, to the greatest extent it determines to be feasible in carrying out the provisions of this article, as amended, shall afford maximum opportunity, consistent with the sound needs of the community as a whole, to the rehabilitation or redevelopment of areas by private enterprise.