Wow I am so lost on this one

I was so, so confident in the wrong answer

I will get a 165 or die trying.

Ahh this really made me feel like I'm making progress. I read it and thought I wouldn't be able to make sense of it, but then I quickly jotted it down in Lawgic and the answer was instantly clear!

I got every single one of these wrong. So very wrong T_T

I brain went "if the concentration of air pollutants is above normal for a prolonged period, then there are many more respiratory issues - than when the concentration of air pollutants is above normal for a short period"

-_-