There remains no compelling evidence for the claim that zoos and aquariums promote attitude change, education, or interest in conservation in visitors.
More here. HT Marc Bekoff who notes:
Elephants in captivity lived an average of 19 years compared to 56 years in the wild.
I think there are very few zoo that give an natural environment to the animals live in it that make them live a better life same as the in the wild or else animals in zoo are in a very poor condition.
lol