User:Mlarios13/Diesel emissions scandal/Bibliography

Outline of proposed changes
I will be adding a section on how the emission standards came to be. The article does not explain why these standards were implemented so I will explain this by using the sources I found.

Source 1. Explains the standards in detail.

Source 2. Explains the science of effects that the emissions had.

Source 3. & Source 4. Explain why automakers would violate these standards/ the effects that the standards have on them.