Do zoo programs help save endangered species?

Do zoos have serious programs to save endangered species, besides putting a few captives on display for everyone to see? (Kelly Traw, Seattle)

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<p><a href="http://www.physorg.com/news158839948.html">Do zoo programs help save endangered species?</a></p> <p>Do zoos have serious programs to save endangered species, besides putting a few captives on display for everyone to see? (Kelly Traw, Seattle)</p>