I just wanted to make a comment and disagree with the comparison with Chemtrails to the breathing on a cold day for the simple fact that once your breath is gone so is the white fog. These chemtrails not contrails stay all the day long and spread through out the sky! I don't have all the facts about these chemtrails, yet but I just didn't like the comparison as the temperature changed why doesn't the so called cirrus cloud dissipate?

Since 1995 I have been making pictures of this phenomenon. A selection of these can be seen at http://www.contrails.nl.

The worst part of Contrails is, as you mentioned, their fading into 'a thin haze that often lasts all day'. The result is a sky that no longer is as blue as meteorologists promised it would be… Rather a sort of milky blue.

Contrails and Aviation Smog not only ruin 'cloudless' days, but they also influence the sun's radiation, partly reflecting it back into space, partly absorbing it, partly spreading the rest. It is obvious that Aviation Smog has an effect on quality and quantity of the sun's radiation (including: sunlight) that reaches the surface of Earth. This cannot remain without unwanted consequences.

Aviation Smog also is a major source of condensation nuclei, which in their lifespan lead to more clouds and more (and heavier) rainfall, snow, and hail in some areas, and thus to less rain etc. in other areas.

Aviation Smog is a 'clearly visible public secret' that is generally ignored by meteorologists, politicians and journalists alike, because flying is very popular…