- How is it measured?
- Is there special equipment to measure THC?
- Who is giving out all of the percentages?
- On all the websites and Packages of seeds.
http://http://www.howstuffworks.com/gif/marijuana-thc-molecule.jpg
Actually I just found something looking through the forums, apparently there is a test kit called cannalyse. Im going to google it and check it out ill update in a few.