seriously, the leaves have a high enough concentration of nicotine to render them unpalatable to numerous animals that otherwise wouldn't hesitate to nom on them. not trying to argue with any of your points, but you're definitely smart enough that you know not to neglect even minor fact-checking excursions.
Not necessary, as no one is writing a grade-able essay. Animals don't eat cigarettes, either. The level of nicotine is negligible to what's added by "Big Tobacco", no matter how The Right wish to categorize it or spin "history".
all bets are off when you roll your own. or at least that's what an individual in the know who may or may not be my fiancée told me. there are so many different varieties of ganja out there, and so many ways it's harvested and processed (sometimes including additives that would make BIG TOBACCO™ blush), and so many different ways it's used, that it's damn near impossible to give a standard chemical composition for cannabis sativa in the form in which you actually smoke it.
Nonsense. I have never heard, read, or even discussed with ANYone in the near twenty-years of smoking pot of anyone adding anything to weed in any form. If a person wants to add something to their joint when rolling it, that's up to the individual. You don't buy weed with "additives". You can buy various strains, just like you can buy various kinds of beer. I know these are the 'Scare Tactic'-speaking-points opponents like to force of the naive when concerning marijuana. Meanwhile, firsthand experience holds the more informed position on the subject...