Don;t close 'em. BBQ some OK but we need a supply oif fresh meat!
Closing zoos is a silly idea. AS SB pointed out, the work done there is important for the survival of many species.
The world is rapidly shrinking and wild habitats with it. There may be a day when the wildest animals left on the planet are in Zoos. Closing zoos as some sort of protection of them is both counter-productive and a juvenile idea.