 Originally Posted by OldSparta
The nice thing about weed is there is virtually no toxins in it. It's quiet literally THC and the actual plant matter. As compared to a cigarette, where it's full of toxins. Like Nicotine, cyanide, tar and the likes. Weed has nothing that sticks to your lungs long term, as compared to cigarettes, it sticks to your lungs and takes a very very very long time to go away. Also, saying that they will die because they forgot what they were doing is not an argument.
 Originally Posted by tommo
Plus ~60 other Cannabinoids. But they're all harmless.
Plus that argument (But if weed-smokers were to smoke 20-60 joints a day) is like saying "YEAH!.... well, water may not be harmless.... but if you drink 60 cups in one go YOU WILL DIE!"
It's a null argument. It literally means nothing.
And it means even LESS in this argument because Cannabis is COMPLETELY non-toxic. It's probably the only thing that is completely non-toxic.
You can't ingest enough to kill yourself.
I don't know where you both get your ideas but you haven't based either argument on fact. For the record, I'm totally pro-marijuana use, but that doesn't mean I'm going to ignore truth. Oh, and let me state that nothing in my argument here is personal, simply a debate of an issue.
Donald P. Tashkin, MD, Director of the Pulmonary Function Laboratories at the University of California, Los Angeles, stated in his article "Effects of Marijuana on the Lung and its Immune Defenses," published in the Mar. 1997 "Secretary's Youth Substance Abuse Prevention Initiative: Resource Papers" by the Center for Substance Abuse Prevention:
"Analysis of the smoke contents of marijuana and tobacco reveals much the same gas phase constituents, including chemicals known to be toxic to respiratory tissue. Moreover, these gas phase components are present in somewhat similar concentrations in the smoke generated from the same quantity of marijuana and tobacco.
The particulate phase (tar) constituents of marijuana and tobacco smoke are also generally similar, with the major exception that marijuana contains tetrahydrocannabinol (THC) and scores of other llIC-like (cannabinoid) compounds not found in tobacco, while tobacco tar contains nicotine not found in marijuana.
With regard to the carcinogenic potential of marijuana, it is noteworthy that the tar phase of marijuana smoke contains many of the same carcinogenic compounds contained in tobacco smoke, including polycyclic aromatic hydrocarbons, such as benz[a]pyrene, which was recently identified as a key factor promoting human lung cancer... Preliminary findings suggest that marijuana smoke activates cytochrome P4501A1, the enzyme that converts polycyclic hydrocarbons, such as benz[a]pyrene, into active carcinogens."
The Mayo Clinic stated in its Aug. 25, 2006 article "Marijuana as Medicine: Consider the Pros and Cons," published on its website:
"Marijuana contains at least 60 chemicals called cannabinoids. Researchers are evaluating how effective some of these cannabinoids might be in controlling symptoms of certain medical conditions. For example:
• THC. An abbreviation for delta-9-tetrahydrocannabinol, THC is the main component responsible for marijuana's mind-altering effect. It also may help treat signs and symptoms such as nausea and vomiting that are associated with a number of medical conditions.
• Cannabinol and cannabidiol. These compounds have some of the properties of THC, but cause less psychoactive effects — the high.
Also, marijuana smoke contains 50 percent to 70 percent more carcinogenic hydrocarbons than does tobacco smoke and has the potential to cause cancer of the lungs and respiratory tract. Marijuana smoke is commonly inhaled deeper and held longer than is tobacco smoke, increasing the lungs' exposure to carcinogens."
This article excerpt from several sources is pretty much the best I can find to something credible about why marijuana is not as harmful as tobacco and even the article I am quoting doesn't say that marijuana is harmless, merely less so.
Smoke from tobacco and cannabis contains many of the same carcinogens and tumor promoters [20,21]. However, cannabis and tobacco have additional pharmacological activities, both receptor-dependent and independent, that result in different biological endpoints. Polycyclic aromatic hydrocarbons found in smoke are pro-carcinogens that are converted to carcinogens by the enzymatic activity of the cytochrome P4501A1 oxidase protein (CYP1A1 gene product). Benzo [a] pyrene is converted to its carcinogenic metabolite diol epoxide, which binds to specific hyper-mutable nucleotide sequences in the K-ras oncogene and p53 tumor suppressor [22]. Recent work by Roth et al. demonstrates that THC treatment of murine hepatoma cells caused a dose dependent increase in CYP1A1 gene transcription, while at the same time directly inhibiting the enzymatic activity of the gene product [23]. Thus, despite potentially higher levels of polycyclic aromatic hydrocarbons found in cannabis smoke compared to tobacco smoke (dependent on what part of the plant is smoked), the THC present in cannabis smoke should exert a protective effect against pro-carcinogens that require activation. In contrast, nicotine activates some CYP1A1 activities, thus potentially increasing the carcinogenic effects of tobacco smoke [24].
Now...back up your argument with credible sources, preferably sources that have nothing to gain from marijuana growth or usage.
And more:
Recently, Dr. Gary Huber at the University of Texas and colleagues from Harvard's School of Public Health conducted a cellular toxicity study of marijuana and tobacco smoke.8 This research group showed that passing marijuana or tobacco smoke through water, or even exposing the smoke to a wetted surface of about 48 square inches, effectively removed substances (acrolein and acetaldehyde) which are toxic to alveolar macrophages. Alveolar macrophages are one of the major defense cells of the lung and are an important component of the immune system. When the macrophages were exposed to smoke that was not water filtered, there was a marked impairment of their capacity to kill bacteria. When the smoke was water-filtered, however, there was no reduction in the bactericidal ability of the macrophages, suggesting that marijuana smoke that has been passed through sufficient water will have less impact on the immune system than marijuana smoke that has not been water-filtered. This intriguing finding would be of particular importance when treating patients with the AIDS wasting syndrome.
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