There is not a simple answer to this question, so here goes...
The most compelling fact that marijuana is NOT harmful to humans, is that there has NEVER been a death attributed to the use of marijuana. 13 states have adopted some form of Medical Marijuana legislation which allows it to be used to treat a wide range of symptoms. Cancer patients, MS patients, people with chronic pain, nausea, glaucoma, anxiety attacks, and many others find that the SIDE EFFECTS of smoking pot relieve their symptoms.
With that being said, it is not without drawbacks. Lung capacity is slightly affected (only a 3-4% change in regular marijuana smokers) due to the inhalation of smoke, but this can be counteracted by using a vaporizer to extract the THC (which is actually an expectorant, and therefore helps clean your lungs) from the plant material. Overall reaction times, short term memory, motivation and the ability to concentrate are affected, but these effects only last while the subject is still high. For this reason, I would have to say that marijuana can be detrimental to some, especially those who are still in school as it can inhibit a student from concentrating, retaining information, and losing the drive to continue .
I won't come out and say "Marijuana is GOOD for humans," so my answer is this:
There are very minor drawbacks to the use of marijuana, which are greatly out-shadowed by the benefits that can come from it's intelligent use. Responsible adults can use it for symptomatic pain relief, as a remedy for a lack of appetite, or even recreationally to relax, and can do so without having to worry about it's effect on their health.
Marijuana effects everyone differently. But the most common effect, is an extremely pleasant 'high' . Try it buddy :)
Not on humans.
no marijuana is good for you
Marijuana is a non-addictive substance. However, humans can turn anything into a habit.
Yes. Just like humans.
Nobody knows. Humans have been using marijuana since thousands of years before the bible was written. Marijuana has also been found in ancient tombs.
No
Yeah but it would just be marijuana flavored. It wont get you high.
Nobody in the history of mankind has ever died of marijuana. Keep in mind, marijuana has been used by humans since long before the bible was written.
nothing, in fact marijuana is good for asthma
just a real good type of weed or medical marijuana
doctors can perscribe marijuana to canser patients
the good kind