It's not just the kill rate. It's also how much more toxic tire dust pollution the heavier vehicles put out.
Moreover, this chemical has been accumulating in the environment, and making its way into food, so we're not just breathing it, but eating it too. Refer to DOI 10.3389/fenvs.2024.1384506
Yep. To the 3rd or 4th power, depending on where exactly you measure it.