VW’s smoke and mirrors

The German car giant Volkswagen (VW) is in crisis. In a scandal labelled “diesel dupe”, the world’s largest automaker has admitted that it rigged diesel vehicles in the US to pass emissions tests in the lab. According to the U.S. Environmental Protection Agency (EPA), some VW diesel cars sold in America had devices that could detect when they were being tested, and then change the engine performance to improve emission results. Once on the road, the engines switched back from ...