“Good bad diesel”

The German environment ministry’s move to stop plans to make it easier to ban diesel cars from cities is a good thing, Carsten Knop writes in Frankfurter Allgemeine Zeitung. Knop argues that the “blue badge” plan would force nearly all existing diesel cars off city roads. He points out that while diesel cars emit nitrogen dioxide, they also emit far less carbon dioxide that gasoline-powered cars. The different objectives must be more reasonably weighed against one another than they were in the debate about manipulated emissions, he adds.