It is hereby declared to be the public policy of the state of Idaho that solid waste disposal systems be established, maintained and operated in each of the several counties of the state for the purpose of reducing the threat to health posed by uncollected garbage, refuse and scrap; for the purpose of maintaining the natural and esthetic setting of our land, water and air resources; for the purpose of providing a means for reclamation of otherwise unusable land areas; and for the purposes of such other cultural, social, economic and sanitation reasons as may be necessary from time to time.