Volkswagen loses 'green car of the year' prizes

Volkswagen has lost its "Green Car of the Year" prize for two models that employed technology at the heart of German giant's pollution-cheating scandal, US prize organizers said Wednesday.

What we know: the Volkswagen emissions test fraud scandal

Just one week ago Volkswagen was a company oozing confidence, the world's best-selling automaker with a global brand that appealed to car buyers seeking trustworthy German engineering at an affordable price.

EPA to change diesel tests to thwart VW-like cheating

The Environmental Protection Agency said Friday that it will launch sweeping changes to the way it tests for diesel emissions after getting duped by clandestine software in Volkswagen cars for seven years.

Germany: VW cars with suspect software in Europe too

The software at the center of Volkswagen's emissions scandal in the U.S. was built into the automaker's cars in Europe as well, Germany said Thursday, though it isn't yet clear if it helped cheat tests as it did in the U.S.

NOx gases in diesel car fumes: Why are they so dangerous?

Nitrogen oxides, poisonous gases that contribute to acid rain and suffocating smog, are found in the fumes of diesel cars like the ones Volkswagen has admitted to fitting with emissions-cheating software.

Diesel vehicles save money over a period of years

Vehicles with clean diesel technology may be more expensive to buy or lease than those that run on gasoline, but they can save their owners thousands of dollars within just a few years, says a University of Michigan researcher.

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