By Kristen Espeland
http://stream.publicbroadcasting.net/production/mp3/wuky/local-wuky-744901.mp3
Horse Cave, KY – Throughout Kentucky, human traffic and pollution have damaged caves and sinkholes. And that, in turn, has polluted the groundwater many end up drinking. Although some of the sensitive ecosystems are making a comeback, as Kentucky Public Radio's Kristen Espeland reports, the caves remain vulnerable.