Where necessary, in order to provide unobstructed air space for the landing and taking off of aircraft utilizing airports and landing fields acquired or maintained under the provisions of this chapter, the counties, cities, park districts, and townships may acquire such air rights over private property as are necessary to ensure safe approaches to the landing areas of said airports and landing fields. Such air rights may be acquired by grant, purchase, lease, or by right of eminent domain in the same manner as is provided in section 2-02-02 for the acquisition of the airport or landing field itself or the expansion thereof.