Every municipality and every county shall have all the powers necessary or convenient to carry out and effectuate the purposes and provisions of this chapter, including the following powers in addition to others granted in this chapter:
The municipality or county is authorized to develop, test, and report methods and techniques and to carry out demonstrations and other activities for the prevention and elimination of pockets of blight and to apply for, accept, and utilize grants of funds from the federal government for such purposes;
OCGA § 36-61-8