Testimony of Defenders' Vice President for Landscape Conservation and Climate Adaptation before the House Natural Resources Committee at am oversight hearing entitled "Oil and Gas Activities within Our Nation's National Wildlife Refuge System"  held May 20th, 2014.  In the testimony, Defenders highlights the need for tracking of the impacts of oil and gas development on National Wildlife Refuges, the costs to taxpayers to maintain and restore ecosystems after wells are abandoned and the existing authority of the US Fish and Wildlife Service and the National Park Service on this matter.