How emissions tests that exposed VW scandal were done

[news]

http://i.cbc.ca/1.3243691.1443193310!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/vw-emissions-testing.jpg John Swanton, an air specialist with the California Air Resources Board, shows CBC reporter Kim Brunhuber the testing done in the lab and on the road similar to that which exposed the VW emissions fraud.


More... (http://start.westnet.ca/newstempcb.php?article=technology/how-emissions-tests-that-exposed-vw-scandal-were-done-1.3243461)