Mammoth Cave threatened by proposed development
18 scientists’ letter to ITA president Dan Cherry
Why building on karst is a bad idea
Geotimes, May 2001
Airport sinkholes cost taxpayers millions
Air pollution at Mammoth Cave National Park
Roger Brucker’s testimony before the EPA
National Resources Defense Council press release
Building on karst brings Mammoth trouble!
by Paul Steward for Descent Magazine Oct./Nov., 2001