For years, Alan Lloyd has regarded diesel as a dirty word, synonymous with brown haze and cancer-causing black soot, according to the Wall Street Journal
. It's a view he has shared with environmental activists across the U.S.But in a striking change of heart that could alter the kinds of cars and trucks Americans drive, the chairman of the powerful California Air Resources Board (CARB) is taking a new look at diesel vehicles. According to the Journal
, he thinks they're poised to emerge as part of the solution to a different environmental problem that's gaining moreattention in the U.S.: global warming.Coming from the head of California's famously feisty clean-air agency, that amounts toenvironmental apostasy, according to the Journal
. But now, Dr. Lloyd is being forced to address the issue of global warming, and here, diesel engines are the greeneroption because they don't pump out as much so-called greenhouse gas as gasoline engines do.