What reason then would you give for these not looking like clouds, not behaving like clouds, and lasting different lengths of time than ALL NORMAL CLOUDS ?
Contrails do not look like naturally formed clouds because they are created by the exhaust of internal combustion engines when passing through atmospheric conditions conducive to cloud formation. Other than their initial appearance, contrails DO behave in EXACTLY the same way "NORMAL CLOUDS" do!
See ya,
Milt

