Vapor duff

Vapor Duff is marijuana that has been has previously been exposed to a vaporizer. Unless the vaporizer was set at a temperature higher than 400 degrees Fahrenheit then the duff presumably still has tetrahydrocannibinol still intact.
* http://www.treatingyourself.com/vbulletin/showthread.php?t20909http://www.weedtracker.com/forums/showthread.php/vaporizer-duff-60794.html?t60794
* http://boards.cannabis.com/medicinal-cannabis-health/114229-smoking-vapor-duff-not-good-me.html
* http://www.420magazine.com/forums/general-420-talk/55886-vaporizer-smoking-duff.html
* http://bluelight.ru/vb/showthread.php?t=281170
 
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