02-21-07 Chemtrails over phoenix

Everytime i fly to Sky Harbor in Phoenix it literally looks like

some one is playing tic-tac-toe in the sky. It happens here too, but not to that degree.

Its not airplanes criss-crossing either.

Because temperature and humidity in the atmosphere varies - even over short distances at the same altitude. Hence it's not uncommon to see a contrail form from a passenger jet, and dissolve in places to leave broken segments of persistent contrail.

When you take into account variations over altitude - and the fact that from the ground an aircraft at 22,000ft and one at 25,000ft may appear to be at the same height - it all becomes perfectly explicable.

Indeed, the 'chemtrail conspiracy' falls on this point because how does it explain such things? How can a chemtrail form and then only partially dissolve?

There was a programme on C4 once upon a time that mentioned the link between contrails and weather. It said the best example of this was immediately after 9/11, when all air traffic above America was suspended, it was often noted that there were peaceful, cloudless skies.
Perhaps that'd be something to research?