![](http://420college.org/wp-content/uploads/2014/06/10337719_889235817759090_5912152930462127908_n-320x182.jpg)
Talking THC, cannabis contains at least 400 different chemicals, its main mind-altering ingredient is THC (delta-9-tetrahydrocannabinol). The amount of THC in marijuana determines the drug’s strength. THC levels are affected by a great many factors, ...
http://420college.org/talking-thc/