Giving people greater access to more drugs is only enabling the risks for bad consequences though. You agreed regarding driving high; doesn't that suggest that you recognise it impairs people? People are idiots- do we really need to give them another way to endanger themselves and others
"Because science" is not really much in way of sources. Here are some papers you might like to read; the findings of the second study, published in 2010, were that the rate of marijuana dependance is higher than that of alcohol.
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Here is a summary of some of the findings from a report published in the June 5 issue of the New England Journal of Medicine:
*Despite the popular belief that the marijuana is not addicting, about 9 percent of those who experiment with the drug, and up to 50 percent who use it every day, will become addicted.
*Smoking marijuana in the teen years is linked with brain abnormalities, such as fewer neural fibers in certain brain areas, decreased brain activity and a smaller hippocampus, an area important for learning and memory.
*People who use marijuana are at greater risk of abusing other drugs later in life, suggesting that marijuana maybe a "gateway drug." However, it could be that people who are more susceptible to drug use in general tend to start with marijuana because it is more accessible, and then move on to other drugs.
*In people who are genetically at risk for schizophrenia, smoking marijuana is linked with an increased risk of developing the condition. However, its possible factors other than marijuana are responsible for the link.
*A person's risk of a car accident doubles if that individual drives shortly after smoking marijuana.
Most studies agree on a minimum 9% addiction rate, even if you disregard the higher findings of the 2010 study. So please don't try to tell me that it's not addictive and "proven in study after study". Not only do I have the anecdotal evidence of my father, who used 5+ times a day every single day of my life, whom I begged to quit but whom I never once knew clean. I also have been able to provide some data to support my position. @(you need an account to see links), you may not wish to argue further on it, but I am just as adamant on my position and am supported by peer-reviewed evidence.