You look like your going alright :)
My only thoughts on this are, studies like this are lame. Even if everything fact in there is true, what part of the Constitution allows them to determine what plants are allowed to grow? And more to the point, what part authorizes them to regulate what an individual puts in their own body?
How about putting the issue to American people to vote on? No not just the 450 or so professional drama queens in Washington, why not let all citizens voice they opinion on this?
Oh wait, then the people might disagree with their masters, and we can't have that.
Ironically though, even if they legalized weed tomorrow, you wouldn't be able to smoke it anywhere, thanks to all the anti-tobacco smoking regulations :)