Satellite image of <a href="https://en.wikipedia.org/wiki/ship_tracks" class="extiw" title="en:ship tracks">ship tracks</a>, clouds created by the exhaust of ship smokestacks.
Liam Gumley, Space Science and Engineering Center, University of Wisconsin-Madison
2005-05-11
<a rel="nofollow" class="external free" href="http://earthobservatory.nasa.gov/IOTD/view.php?id=5488">http://earthobservatory.nasa.gov/IOTD/view.php?id=5488</a> <a href="https://en.wikipedia.org/wiki/NASA_Earth_Observatory" class="extiw" title="en:NASA Earth Observatory">en:NASA Earth Observatory</a>