Diesel cars and government failure

Good example from tutor2u

http://www.tutor2u.net/economics/blog/vw-and-government-failure?utm_medium=email&utm_campaign=Daily+tutor2u+Economics+updates&utm_content=Daily+tutor2u+Economics+updates+CID_d26a0979b4a854102c229e64835ab716&utm_source=CampMonitor&utm_term=Blog++VW+and+government+failure