I dunno.
Seeing the way people, especially primitives, are such idiots about gooing and gawing over innocent wild animals, I've always been against zoos.
It's really disgusting and classless, the way some people just won't leave animals alone.
I'm surely one of the best friends nature and the environment have; I just leave nature and the environment alone to do their own thing, without interference from me.
If one wants to know what a polar bear looks like, one can go to the library and check out a book; likewise, if one wants to know what the mountains look like, one can go to the library and check out a book.
After reading a primitive complaining that the grass in Yellowstone National Park isn't mowed and flowers planted and sidewalks installed, I decided the last best hope for preservation of that natural nature treasure would be erection of a 400-foot-tall wall around the whole thing, so as to keep humans out and to let nature do its own thing unmolested.
If someone wants to see Old Faithful erupt, they can go to the library and check out a book.
I know this is a minority opinion, but it's mine, and there you have it.