Jack Johnson - Traffic in the Sky - Chem-trails
Chem trails - The belief is that a chemical and/or biological agent of some sort is being released. The term "chemtrail" does not refer to common forms of aerial dumping (e.g. crop dusting, cloud seeding or aerial firefighting). It specifically refers to systematic, high-altitude dumping of unknown substances for undisclosed purposes, resulting in the appearance of these unusual contrails.