This is from Shell in 1995. "Is climate change occuring already?" CO2-concentration was 360 ppm. Today it is 420. How honest were they? Were they really that "uncertain"? www.documentcloud.org/documents/44...
Look, I know you want to max it out for your PPM and set it to 14, but PLEASE consider 3. If your station is unbearable, then who's going to listen to the station? Then you lose listeners. Since the point of PPM is for Nielson ratings, wouldn't you want people tuned in, than turned off?