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22 Mar 2:00am

Dirty lies: how the car industry hid the truth about diesel emissions

The Guardian
The ‘Dieselgate’ scandal was suppressed for years – while we should have been driving electric cars. By Beth Gardiner John German had not been looking to make a splash when he commissioned an examination of pollution from diesel cars back in 2013. The exam compared what came out of their exhausts, during the lab tests that were required by law, with emissions on the road under real driving conditions. German and his colleagues at the International Council on Clean Transportation (ICCT) in the US just wanted to tie up the last loose ends in a big report, and thought the research would give them something positive to say about diesel. They might even be able to offer tips to Europe from the US’s experience in getting the dirty fuel to run a little cleaner. But that was not how it turned out. They chose a Volkswagen Jetta as their first test subject, and a VW Passat next. Regulators in California agreed to do the routine certification test for them, and the council hired researchers from West Virginia University to then drive the same cars through cities, along highways and into the mountains, using equipment that tests emissions straight from the cars’ exhausts.
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