Listen - the more nuclei present in a jet emission the more initial nucleation takes place - yes, and if there's more nuclei still in the atmosphere plus all the other necessary conditions: hpa, rhi (in the case of cirrus) temp/dewpoint etc. then you've got clouds. The point to this discussion is that it's definitely the aircraft making the clouds. They do it quite a lot - have you noticed it? The aircraft passing overhead are creating cloud cover on a very regular basis where I come from. You say in some other post that I'm not interested in the subject - only in arguing. Listen, you think what you like, and I'm sure you'll continue to do just that, but if anyone who lived in one of the world's largest cities, looked up a bit and saw that his/her sunlight was being seriously compromised by the passage of aircraft - then wouldn't that be of the utmost interest to, well, anyone? Maybe I should say, 'anyone with an idea?'
OMG!!! Clouds!!!
RUN AWAY!!!
That's absolute proof that there is a spray program! Not...
And please show me evidence that your "sunlight was being seriously compromised by the passage of aircraft". Please show me evidence that the loss of sunlight has harmed you in any way. Please tell me what you are doing about natural clouds when they seriously compromise your sunlight. Honestly...a few trails here and there...and it's that much of a problem?! Show me that you are in the shadow of such trails at ANY time...
I'm not buying it.
To me, it just sounds like you feel you have the right to see blue skies whenever you want, and you are angry at the airlines for making contrails and you are USING the "chemtrail" urban legend to get others onboard.
They are contrails and there is no evidence that they are intentional and there is no evidence that they are anything more than a byproduct of aviation.
Honestly, if you people care so much about the LOOK of these trails, what makes you think that spreading a conspiracy theory about the trails will make them disappear? You need to fight them for what they actually ARE...and get people to join the campaign against CONTRAILS.
Aligning yourself with the conspiracy nuts only assures that the trails will NEVER go away. They will just be dismissed as something "crazy" people believe.