For the gearheads at West Virginia University, it was a minor commission. An environmental group, the International Council on Clean Transportation, had asked the school's Center for Alternative Fuels, Engines and Emissions to test the tailpipes of diesel cars in the U.S., such as those sold by Volkswagen and BMW. Studies suggested that automakers' diesel cars polluted more on the road than in the lab, and curiously, more in Europe than in the U.S. ICCT wanted to figure out what the automakers had done to meet America's tougher emissions standards and how to repatriate these improvements for European car buyers.
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