the only way i can see joints being more wasteful is if it is rolled incorrectly and just burns way to fast...

or if it starts to run.... that is also wasteful....

thedazn, it doesnt waste marijuana.... the percentages you just listed are how much thc burns, there is a lot more to marijuana than just thc.... and also i dont think those are right, ive seen somewhere else that a joint has more than a bowl...
i could be wrong tho... until i see the study i aint believing it, no offense...