It is hereby found that an airport hazard endangers the lives and property of the general public, of users of the airport and of occupants of land in its vicinity, and also, if of the obstruction type, in effect reduces the size of the area available for the landing, taking-off, and maneuvering of aircraft, thus tending to destroy or impair the utility of the airport and the public investment therein. Accordingly, it is hereby declared: (a) That the creation or establishment or maintenance of an airport hazard is a public nuisance and an injury to the community served by the airport in question; and (b) that it is therefore necessary in the interest of the public health, public safety, and general welfare that the creation or establishment of airport hazards be prevented. It is further declared that both the prevention of the creation or establishment of airport hazards and the elimination, removal, alteration, mitigation, abatement, or marking or lighting of existing airport hazards are public purposes for which political subdivisions may raise and expend public funds and acquire land or property rights therein.