i have heard this same mindless unquestioning drivel from "professionals" across the web. it does not ever address the change that you and i are old enough to see in our skies. it also does not address the chemical content that has been tested coming out of our skies.
to say that the gov would not poison the very air that they also breathe is absurd. they have been poisoning land, water and air with gusto for decades. its like an alcoholic who keeps drinking knowing he is killing his liver. does it make sense? no. does he stop? no.