Flutterby™! : Crashes vs Pollution

Transportationist: Death by car: Are you more likely to die from a crash or breathing its toxic emissions?:

It turns out, Deaths by Crashes is larger, according to official sources, but not as much as I expected. And, the answer depends on what metric you use.

CityLab digs a little deeper:

Circling back to the original question, whether car crashes or auto emissions is deadlier, we find any answer requires additional parameters. Strictly speaking, Americans appear more likely to die from auto emissions. In terms of wasted life potential, crashes seem the bigger danger. If anything, the absence of a clear single answer is a revelation in itself, suggesting that the problems are more on par than we typically treat them.