Bloomberg: In low brown-brick buildings near the University of Michigan, 350 workers test the emissions on 400 vehicles a year, tearing them apart as needed. Their tools detect pollutants like nitrogen oxide at 100 parts per billion. In a hangar-size garage, they chain 80,000-pound freight trucks in place and spin their wheels at 90 miles an hour, measuring the exhaust.
Welcome to the hive of Chris Grundler--environmental sleuth, bureaucrat and more-than-occasional bane of the auto industry.
As head of...