"Chemtrails" nonsense debunked

http://conspiracies.skepticproject.com/articles/chemtrails/

Author: Dave Sorensen
Contributors: Edward L Winston

Table of Contents

1. Terms and Terminology
   1. What a contrail is
   2. What a chemtrail is
2. Conspiracy Claims
   1. Chemtrails last longer than contrails
   2. Chemtrails are making people sick
   3. Chemtrails appear in strange formations
   4. Chemtrails contain barium and other heavy metals
   5. Checkerboard patterns
   6. Planes with sprayers
   7. Chemtrails leaves behind mysterious jelly
   8. Chemtrails cause Morgellon's disease
   9. The UK admits to spraying their citizens
   10. They are spraying harmful biological agents
   11. They are spraying "cob webs" and other strange stuff
   12. Kucinich wrote the Space Preservation Act HR 2977
   13. Germans have admitted on television that they are spraying "chemtrails"
3. Alleged Purposes
   1. Chemtrails are being used to prevent global warming
   2. Chemtrails are being used to create a projection screen
   3.