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.

'Volkswagen crisis' bad news for German companies

Volkswagen (VW), one of the world's biggest vehicle manufacturers, has admitted to programming around 11 million of its cars to detect when they were being tested and alter the running of their diesel engines to hide the ...

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.

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