Also how am I going to find a study on the long term effects of just smoking weed on the lungs. Long term being 50-60 years so it would have had to start in the 60s. We both know there is no such thing as a long term study with the rigid bounds we would both require, large sample group with a control no additional outside forces ect. The only way to know is to do it ourselves. I smoke cigs and not enough weed so I guess we will meet in Cali around the year 2050 and I'll have 20 bucks for you
Parrell Longitudinal studies are not needed to deduce this. Pharmalogical studies have been doing this for decades, anyway.
source: psychobiology minor, neuropsychology liberal arts degree. I read a lot of studies.
If you can granted access (if you go to a uni in the USA you can get free access) to PSYCinfo or PSYCdocs it is loaded, LOADED with peer reviewed, published and reliable studies with a VAST search engine. I did a very fast search there and here is an abstract and references to each study the from the abstract.
Cannabis Smoke Versus Tobacco Smoke
Cannabis smoke contains many of the same carcinogens as tobacco smoke, including greater concentrations of certain aromatic hydrocarbons such as benzopyrene, prompting fears that chronic marijuana inhalation may be a risk factor for tobacco-use related cancers. However, marijuana smoke also contains cannabinoids such as THC (delta-9-tetrahydrocannabinol) and CBD (cannabidiol), which are non-carcinogenic and demonstrate anti-cancer properties in vivo and in vitro. By contrast, nicotine promotes the development of cancer cells and their blood supply. In addition, cannabinoids stimulate other biological activities and responses that may mitigate the carcinogenic effects of smoke, such as down-regulating the inflammatory arm of the immune system that is responsible for producing potentially carcinogenic free radicals (unstable atoms that are believed to accelerate the progression of cancer).
Cannabis smoke – unlike tobacco smoke – has not been definitively linked to cancer in humans, including those cancers associated with tobacco use. However, certain cellular abnormalities in the lungs have been identified more frequently in long-term smokers of cannabis compared to non-smokers. Chronic exposure to cannabis smoke has also been associated with the development of pre-cancerous changes in bronchial and epithelium cells in similar rates to tobacco smokers. Cellular abnormalities were most present in individuals who smoked both tobacco and marijuana, implying that cannabis and tobacco smoke may have an additive adverse effect on airway tissue. The results suggest that long-term exposure to cannabis smoke, particularly when combined with tobacco smoking, is capable of damaging the bronchial system in ways that could one day lead to respiratory cancers. However, to date, no epidemiologic studies of cannabis-only smokers have yet to reveal such a finding. Larger, better-controlled studies are warranted.
References:
Cannabinoids and cancer: causation, remediation, and palliation. Lancet Oncology. 2005
Cannabinoids: potential anticancer agents. Nature Reviews Cancer. 2003.
Nicotine exposure and bronchial epithelial cell nicotinic acetylcholine receptor expression in the pathogenesis of lung cancer. Journal of Clinical Investigation. 2003
Cannabis and tobacco smoke are not equally carcinogenic. Harm Reduction Journal. 2005
National Academy of Sciences, Institute of Medicine. Marijuana and Medicine: Assessing the Science Base. National Academy Press. 1999
Tracheobronchial histopathology in habitual smokers of cocaine, marijuana and/or tobacco. Chest. 1997
Histopathologic and molecular alterations in bronchial epithelium in habitual smokers of marijuana, cocaine and/or tobacco. Journal of the National Cancer Institute. 1998
Cannabis vaporizer combines efficient delivery of THC with effective suppression of pyrolytic compounds. Journal of Cannabis Therapeutics. 2004
Hazekamp et al. 2006. Evaluation of a vaporizing device (Volcano) for pulmonary administration of tetrahydrocannabinol. Journal of Pharmaceutical Sciences 95: 1308-1317
Vaporization as a smokeless cannabis delivery system: a pilot study. Clinical Pharmacology & Therapeutics. 2007