Am I the only one that finds it strange that airplanes (man) now make clouds? What are you talking about, you may ask! I would have thought this was crazy too, until someone pointed it out to me and showed me the very act. Now, that my eyes have been opened so to speak its unbelievable how often this occurs. Go outside and look up. I can guarantee you that perhaps 25 percent of you will see a cloud that looks like a straight line. Over time it will spread from the line. Keep looking. Another airplane will make another line and another. Usually criss-crossing until the blue sky turns hazy. It happens in America, Europe etc. Usually in the early morning, but can be any time. It is a little scary if you ask me. Oddly, weathermen never mention this. Although any of you can see it (if it doesn't happen today, keep watching.), though everyone pretends it doesn't exist. It is so prevalent now especially now that you are looking for it, that they should have made up some sort of reasoning for us to think about, like it's to prevent ozone depletion or something. Anyone see the odd clouds, or the airplane right now making them? If, not monitor the skies for a week. Just for the record, most airplanes leave a very short vapor trail that disappears, not that stays for hours and turns into clouds. Thanks and sorry for ruining your day.