Ah Big N, you do site that website very well, and more power to them for existing, however go read medical research journals, not a third party information site that merely copied their information ffrom the government sources, I know i called their 1-800 and asked where they get the information from. Let's just say that all things are politically motivated, as you suggested with coffee, yet you seem to dismiss such poilitical effect on marijuana, why?
Furthermore, the health side effects of lower testosterone levels, exist with ANY kind of smoking. In terms of psycological dependence leading to more being used, that's called tolerance like I said. Your body develops tolerances to everything, its the only way we could survive. I also saw some redundancy in your comments, like problems related to smokers, tar, and bronchitis; aren't they all problem's similar to those experienced by smokers. Anyway, I said nothing of smoking marijuana. I simply said that human physiology and the cannabanoids in marijuana do not act synergystecially and they do not. If the delivery method, you proposed smoking, causes problems, its not the fault of the chemical. Marijuana is also eaten in alot of cultures. Do they experience bronchitis from it? Get real. In terms of the neurons in your body, and lets get specific here, its the cortextual neurons on the blood brain barrier that are primarily affected. They dont die like with alcohol, or scar like with caffeine, yes caffeine. Rather they have lipids attach to them over a period of time, very slowly or not at all if the use is not continuous. Oh and the body processes them away in six months after stopping of usage.
You raised god points, but my thought is this, that was a site advertising theri drug rehab program, they make money and exist in a capitalist enviornment by getting people to go pay them to get them clean, I wonder are they an NPO (Non-Profit Organization). lol. Anyway, if you care to actually read real research journals i can give you the names of a few, but it usually requires going to to a campus medical library if you don't mind.
--Were just two lost souls swimmin' in a fish bowl--