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A key piece of the Obama administration's efforts to cut back on carbon emissions faces a test in court on Tuesday. An appeals court is hearing arguments on regulations announced last year.
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As early as 2007, Volkswagen was reportedly warned by the contractor that supplied the now-infamous engine management software that it would be illegal to sell cars with deceptive settings.
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The new report found that a BMW X3 produced more than 11 times the amount of nitrous oxides pollution allowed under Europe's standards.
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Arvind Thiruvengadam and colleagues at WVU got excited when they won a grant in 2012 to test emissions on a few diesel cars. He figured the data might result in some papers a few people might read.
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The agency says some 480,000 diesel-powered Volkswagens have sophisticated software that detects emissions testing — and "turns full emissions controls on only during the test."