Smoking pot decreases the risk of having lung cancer

When we talk about smoking, sure smoking tobacco cause cancer. What about canabbis smoking, must it cause cancer too? Wrong!

In fact marijuana smoking decreases the risk of having lung cancer and not a cause of chronic obstructive pulmonary disease. Therefore, smoking pot is safe than cigars.

The content of marijuana and tobacco smoke is very similar. There is a higher concentrate of cancer-causing chemicals in marijuana tar, and it reaches the lungs before any other organ, so there is this idea that they are related in causing the same health issues of the lungs. But through Dr. Tashkin clinical studies he failed to find any positive association with cancer. Instead, the association would be negative, between lung cancer and the use of marijuana. The likelihood is, that despite the fact that marijuana smoke contains carcinogens, Dr. Tashkin don’t see the same heightened risks of cancers that we see in tobacco.

Dr. Tashkin is not alone in this fact findings. The Cannabis and Respiratory Disease Research Group of New Zealand have investigate the association between cannabis smoking and lung cancer risk. For a good read please follow https://onlinelibrary.wiley.com/doi/abs/10.1002/ijc.29036

Cannabis smoking and lung cancer risk: Pooled analysis in the International Lung Cancer Consortium
Abstract

To investigate the association between cannabis smoking and lung cancer risk, data on 2,159 lung cancer cases and 2,985 controls were pooled from 6 case‐control studies in the US, Canada, UK, and New Zealand within the International Lung Cancer Consortium. Study‐specific associations between cannabis smoking and lung cancer were estimated using unconditional logistic regression adjusting for sociodemographic factors, tobacco smoking status and pack‐years; odds‐ratio estimates were pooled using random effects models. Subgroup analyses were done for sex, histology and tobacco smoking status. The shapes of dose‐response associations were examined using restricted cubic spline regression. The overall pooled OR for habitual versus nonhabitual or never users was 0.96 (95% CI: 0.66–1.38). Compared to nonhabitual or never users, the summary OR was 0.88 (95%CI: 0.63–1.24) for individuals who smoked 1 or more joint‐equivalents of cannabis per day and 0.94 (95%CI: 0.67–1.32) for those consumed at least 10 joint‐years. For adenocarcinoma cases the ORs were 1.73 (95%CI: 0.75–4.00) and 1.74 (95%CI: 0.85–3.55), respectively. However, no association was found for the squamous cell carcinoma based on small numbers. Weak associations between cannabis smoking and lung cancer were observed in never tobacco smokers. Spline modeling indicated a weak positive monotonic association between cumulative cannabis use and lung cancer, but precision was low at high exposure levels. Results from our pooled analyses provide little evidence for an increased risk of lung cancer among habitual or long‐term cannabis smokers, although the possibility of potential adverse effect for heavy consumption cannot be excluded.

Based on what I have read "I wonder why marijuana is illegal but tobacco which cause lungs cancer & alcohol which cause liver cancer are legal."