Margo Oge, headed the Office of Transportation and AIr Quality at the U.S. Environmental Protection Agency from 1994-2012. Here she points out the contradiction in what automakers supported when the current fuel emission standards were set and today's effort by the Trump administration to loosen the standards. She also points to the contradiction between the trends in Europe, China, India, which are moving towards stricter standards and the U.S. reversing direction. About one dozen states in addition to California have the power under the Clean Air Act to set their own standards. These states make up about one third of the U.S. market. What would result is a fracturing of the U.S. market. This would create problems for automakers as one expert recently pointed out in the NYT, that automakers should be careful what they wish for. Automakers such as Ford say they support the current fuel emissions standards, yet call for flexibility. GM's CEO, Mary Barra, says she supports current standards. Toyota also says it supports the current emission standards. And diesel engines are now declining in Europe as a result of fuel emissions standards to preserve good air quality. History has shown the automakers have suffered badly from competition when emissions and fuel efficiency standards were lax. During the last decade the auto industry in Michigan faced decline as a result of poor management decisions and lack of foresight in pushing forward with new technologies in this field. The current recovery in the auto industry is a result of a reversal of the poor decisions made between 2000-2008, including fuel emissions and fuel efficiency, air quality decisions. ...