At the center of the scandal is software, installed in upwards of 500,000 diesel vehicles, that was able to detect when the car was undergoing an official emissions test. The so-called "defeat device" would limit car emissions for the duration of the test. Once it had concluded, however, the car would return to emitting nitrogen oxides, linked to asthma and respiratory illness, at levels up to 40 times the legal limit. Read More?at www.news.vice.com