This subdivision is adopted under the police power of the state to conserve and safeguard the public safety, health, morals, and welfare, and to further the economic growth and stability of the people of the state through encouragement to the development of the tourist industry within the state. A clean, wholesome, attractive environment is declared to be of importance to the health and safety of the inhabitants and the safeguarding of their material rights against unwarrantable invasion. In addition, such an environment is considered essential to the maintenance and continued development of the tourist and recreational industry which is hereby declared to be of significant and proven importance to the economy of the state and the general welfare of its citizens. At the same time, it is recognized that the maintenance of junk yards as defined in this subdivision, is a useful and necessary business and ought to be encouraged when not in conflict with the express purposes of this subdivision.