(1) The policy of the State is to conserve, protect, and encourage the development and improvement of its agricultural land and facilities for the production of food and other agricultural products.

(2) When nonagricultural land uses extend into agricultural areas, agricultural operations often become the subject of nuisance suits and as a result (a) agricultural facilities are sometimes forced to cease operations, and (b) many persons are discouraged from making investments in farm improvements or adopting new technology or methods.

(3) This chapter is enacted to reduce the loss to the State of its agricultural resources by limiting the circumstances under which agricultural facilities and operations may be considered a nuisance.

(4) The purpose of this chapter is to lessen the loss of farmland caused by common law nuisance actions which arise when nonagricultural land uses expand into agricultural areas. This purpose is justified by the stated social desire of preserving and encouraging agricultural production.

(5) With the exception of new swine operations and new slaughterhouse operations, in the interest of homeland security and in order to secure the availability, quality, and safety of food produced in South Carolina, it is the intent of the General Assembly that state law and the regulations of the Department of Health and Environmental Control pre-empt the entire field of and constitute a complete and integrated regulatory plan for agricultural facilities and agricultural operations as defined in § 46-45-20, thereby precluding a county from passing an ordinance that is not identical to the state provisions.