Volkswagen emissions scandal

The style used will be ACS style.

Presentation instructions: You must identify a topic covered in the chemical literature within the past six months, obtain at least five additional, peer reviewed resources to support and expand the topic, prepare a scientific poster of the information which you will present on the final day of class.

I haven’t found trustworthy sources about this article that I found on Wikipedia(https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal). So if you could find trustworthy sources instead, that would be great. However I would like to make a presentation on it, and figure out how they did to trick the test.
This is a chemistry Poster Presentation. I ordered like a powerpoint. I will put the poster together.
In case you need any further information or have questions, let me know