A consensus has formed, in a remarkably short time since the VW scandal, that Europe’s rush to embrace diesel cars was a colossal policy error. For a meaningless cut in greenhouse emissions, Europe got higher emissions of nitrogen oxides and diesel particulates. While claims of thousands of additional deaths from this diesel pollution are questionable, Europe now realizes it converted half its cars to diesel for no good reason. And this is just the beginning.
If carbon dioxide is a problem, cars were never the solution. Cars and light trucks account for less than 8% of global emissions; U.S. cars and light trucks account for less than 3%. U.S. car makers are being required by government to spend hundreds of billions on fuel-mileage improvements in the name of global warming that will have virtually zero effect on global warming.