I think you are missing the fact that these numbers seem so wildly skewed because the "crackdown on internal combustion" is working. The regulatory efforts arou

I think you are missing the fact that these numbers seem so wildly skewed because the "crackdown on internal combustion" is working. The regulatory efforts around curbing automobile pollution have had a massively positive impact on air quality in the past several decades. The ratio here is 1000000:1 largely because of those regulations.