My hubby is paranoid about these things. For the last year or so, our skies (mid- WV) are filled with barium clouds.
After hearing him ranting about them for the last several months, I decided to look it up myself.
But I'm not intelligent (or informed ?) enough to really make sense of it all.

http://www.bariumblues.com/emr1.htm

Is it more unfounded conspiracy theories, or is there more to it?