Contrails, also known as a vapor trail, is a term used to describe the streak of condensation left behind as a plane flies through the sky. The condensation created from the planes exhaust are actually artificial cirrus clouds. Often in a photo critique comments will be made recommending the removal of this visual pollutant using a variety of photo editing tools.
Example of a contrail removed from a landscape photo:
Note this is an animated Gif that will cycle (8) times.
Reload the page to repeat the cycle.
Contrail at sunset:
[tags]contrail, photo, term, terminology, education[/tags]
Or you can go the opposite approach and show people how obnoxious this activity is. I’ve seen contrails over the Maroon Bells and Arches NP even.
http://www.rwongphoto.com/RW2731.html