Volkswagen recently hit global headlines as it was uncovered that they had been cheating in emission tests by making its cars appear far less polluting than they are.
The Guardian reported that the US Environmental Protection Agency discovered that 482,000 VW diesel cars on American roads were emitting up to 40 times more toxic fumes than permitted – and VW has since admitted the cheat affects 11m cars worldwide.
Volkswagen’s “defeat device” wasn’t a physical device, but instead a programme in the engine software that effectively sensed when the car was being tested and as a result activated equipment that reduced emissions. However, this was not the case in regular driving as the software turned off and increased emissions far above legal limits – up to 40 times of what is legal in the US.
It has also meant that far more harmful NOx emissions, including nitrogen dioxide, have been pumped into the air than was thought – on one analysis, between 250,000 to 1m extra tonnes every year. The hidden damage from these VW vehicles could equate to all of the UK’s NOx emissions from all power stations, vehicles, industry and agriculture, says the Guardian.
It is not yet known exactly which systems Volkswagen modified, but experts are said to be focusing on parts of the exhaust system that are designed to reduce emissions of nitrogen oxide, a pollutant that can cause emphysema, bronchitis and other respiratory diseases.
The Environmental Protection Agency said in September that it would order Volkswagen to recall seven of its American car models with affected engines, which amount to total of about 500,000 vehicles.
Volkswagen will be getting in touch with anyone who has a car that has been affected as they now face $18bn (£12bn) in penalties under the US Clean Air Act, which allows fines of up to $37,500 per car.
In addition, the European Parliament has now also voted to set up a committee to investigate the scandal in more depth.