http://wkyufm.org en http://wkyufm.org/post/mammoth-cave-national-park-making-use-low-emission-vehicles <p>Mammoth Cave National Park is making use of some new propane-fueled vehicles, thanks to a partnership between the National Park Service and the Department of Energy&#39;s Clean Cities Program. The vehicles are helping to reduce greenhouse gas emissions in the park. Mon, 07 May 2012 11:40:00 +0000 Dan Modlin 11891 at http://wkyufm.org Mammoth Cave National Park Making Use of Low-emission Vehicles