Most anything the UN does is a jobs program for the politically connected. It is guaranteed to cost more and yield few if any results. That DeBlasio endorses it means it is a leftists wet dream of how to better marginalize those on the right.
As an aside you really have to wonder about a guy that changes his name as often as he does. He was born Warren Wilhelm Jr. After college he changed his name to Warren de Blasio-Wilhelm. Years later he changed it again to Bill de Blasio, though he seems to go by De Blasio these days. de Blasio was his mother’s maiden name.