KLETTWITZ, GERMANY - NOVEMBER 25: A PEMS (Portable Emissions Measurement System) device for testing the emissions of cars in real driving situations is seen attached to the exhaust pipe of a car during a workshop for media on automobile emissions at the DEKRA testing facility on November 25, 2015 in Klettwitz, Germany. European authorities are reconsidering their emissions testing procedures for cars in the wake of the Volkswagen diesel emissions cheating scandal. DEKRA is Germany's biggest independent automotive technical testing agency. (Photo by Sean Gallup/Getty Images)
