I am a little confused, why would sloppiness in the media release (the article that uses the word tailpipe), have anything to do with sloppiness in the study, which the above comment clearly highlights is about PM2.5, not specifically tailpipe emissions?

Are Yale's media releases typically done by the people who do the study?

The study isn’t sloppy, and I would highly suggest reading it before casting aspersions at the authors:

https://www.nature.com/articles/s44407-025-00037-2

The study doesn't mention tailpipes (afiact). This press release/article does. Don't dismiss scientists because journalists reporting their findings incorrectly.