Gov. Gary Herbert prevaricates.
Herbert says that he is concerned about filthy air. He suggests getting more people out of cars and onto public transit.
But modern gasoline engines are very clean. Although gasoline outsells diesel fuel by roughly 10 gallons to one, studies show that diesel emissions are responsible for 65-90 percent of vehicular particulate pollution. To talk about reducing air pollution without mentioning diesels (or refineries and other major industrial sources) is prevarication.