Quote:
|
These intensive horticultural techniques have led to fewer seeds being present in cannabis and a general increase in potency over the past 20 years. The average levels of THC in marijuana sold in United States rose from 3.5% in 1988 to 7% in 2003 and 8.5% in 2006
|
http://en.wikipedia.org/wiki/Cannabis_(drug)
I know wikipedia blah blah.
Regardless... now a days it's man made with all these different strains and what not.
And you are still depriving your brain of oxygen... it must be great for you when you sit there and hold your breath with smoke in your lungs.