One of the great hopes for saving the coal industry is the development of a cheap, efficient way to permanently store the carbon emitted from it, but so far, carbon capture and storage has struggled to live up to expectations.

David Mohler is the deputy assistant secretary of clean coal and carbon management at the U.S. Department of Energy, and is in charge of federal research and development in those areas. In an interview, Wyoming Public Radio’s Stephanie Joyce started by asking him what we should make of the fact that a number of carbon capture projects have failed recently after the Department of Energy abandoned its support for them.