Gas prices are rising with no end in sight, which would seem to indicate bad timing for a proposed gas tax hike in Maryland. Even with more pain at the pump, a tax increase could be the needed catalyst for Americans to shift to alternative energy sources. In this edition of Smith Business Close-Up with the University of Maryland’s Robert H. Smith School of Business, Charles Olson talks about how a gas tax increase in Maryland could help encourage the use of natural gas as an alternative fuel.