> They have fitted each tower with machines that emit a nonlethal avian respiratory irritant derived from grape juice concentrate, a method typically used to ke

> They have fitted each tower with machines that emit a nonlethal avian respiratory irritant derived from grape juice concentrate, a method typically used to keep birds from congregating on agricultural fields and commercial centers. Your comments might be helpful to discussion if you read the article first to understand what has been already tried instead of jumping to offer a solution.