Nearly a dozen west Texas cities, counties, hospitals and school districts are facing a possible bond downgrade in coming months by Moody's Investor Services, one of the country's "Big Three" ratings firms. That because those local institutions rely on energy-related tax revenue, which has gone way down. And a bond downgrade is a threat facing other oil and gas states as well. For Inside Energy, Lorne Matalon of Marfa Public radio reports.