What are the moral, social and health reasons for and against smoking marujana?
I'm sure there are more...
As Rotten said I believe all those side affects are true. But if used it moderation I don't really think its much worse than have a few beers every now and then. Might be a bit worse for your health since you are smoking something and that cannot be good for your lunges.
I used to be throughly convinced pot was absolutely terrible for you and would make you into a lazy, complete looser with no future. But I have met too many people who have a joint now and then and really lead nice successful lives. Could they be more successful if they had never touched marijuana? Possibly. But I'm no longer convinced is the absolute evil I thought it once was. I still would urge any friend not to try it or to stop if they are, just like I would urge them to stop smoking.
That is true for any drug. For any substance actually. If you are excessive in devouring chocolate it is bad for you. If you are excessive in using pain killer that is also bad for you and you might become addicted. If you excessively consume apples, you'll get digestion issues. >_<
If you consume only 1µ-gram of a very dangerous, addictive illegal drug it will have no effect and be harmless. If you consume minute traces of arsenic dissolved in water filtered by volcanic rocks, that will not be poisonous.
Yes, it's always the dose that makes any substance dangerous.
The effect seems to vary a lot. I've met people who were middle aged successful professionals who have smoked since they were kids who are as lucid and cogent as anyone you will meet. I've also seen people who 6 months after starting to smoke became worthless, ambitionless, stoners who no longer cared about anything beyond where to get their next fix.