and here let's read up some of this shit
Effects on Daily Life
Research clearly demonstrates that marijuana has the potential to cause problems in daily life or make a person’s existing problems worse. In one study, heavy marijuana abusers reported that the drug impaired several important measures of life achievement including physical and mental health, cognitive abilities, social life, and career status.11 Several studies associate workers’ marijuana smoking with increased absences, tardiness, accidents, workers’ compensation claims, and job turnover.
The bold part can not be a cause effect, because smoking weed does not directly cause you to be absent or tardy to work.

At saying weed can affect you're social life and career status, yes but so does breaking your arm and so does have a girlfriend.
Effects on the Lungs
Numerous studies have shown marijuana smoke to contain carcinogens and to be an irritant to the lungs. In fact, marijuana smoke contains 50–70 percent more carcinogenic hydrocarbons than does tobacco smoke. Marijuana users usually inhale more deeply and hold their breath longer than tobacco smokers do, which further increase the lungs’ exposure to carcinogenic smoke. Marijuana smokers show dysregulated growth of epithelial cells in their lung tissue, which could lead to cancer;8 however, a recent case-controlled study found no positive associations between marijuana use and lung, upper respiratory, or upper digestive tract cancers.9 Thus, the link between marijuana smoking and these cancers remains unsubstantiated at this time.
Well that should dismiss all that talk.
Nonetheless, marijuana smokers can have many of the same respiratory problems as tobacco smokers, such as daily cough and phlegm production, more frequent acute chest illness, and a heightened risk of lung infections. A study of 450 individuals found that people who smoke marijuana frequently but do not smoke tobacco have more health problems and miss more days of work than nonsmokers.10 Many of the extra sick days among the marijuana smokers in the study were for respiratory illnesses. (Yeah I doubt those were actually sicks days, if not more to do with just not wanting to go work or class)
This may be true, but you got think of it in context. Tobacco smokers are constantly smoking for about 5 minutes, and most of those who get cancer or infections are because they smoke a pack or two a day. Now compare that with weed where you might be getting between only 5-10 hits, and no one smokes weed like a heavy cig smoker. The bold part, again you cannot say that's a cause effect.
Marijuana increases heart rate by 20–100 percent shortly after smoking; this effect can last up to 3 hours. In one study, it was estimated that marijuana users have a 4.8-fold increase in the risk of heart attack in the first hour after smoking the drug.7 This may be due to the increased heart rate as well as effects of marijuana on heart rhythms, causing palpitations and arrhythmias. This risk may be greater in aging populations or those with cardiac vulnerabilities.
Wow at that number, there's a reason that there's a quote saying "97% of percentages are bullshit." Now yes, smoking weed does raise your heartbeat, but just like the quote says "may be greater with those with cardiac vulnerabilities" Well no shit if you have problems like that then you should not be smoking. Most people who are normal in health are not greatly affected in their heart.
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I'm sorry but case is closed. Weed is not bad for you and in my opinion it does more good than it does bad. More people are at risk of dying when they're in a car with a female driver rather than from smoking weed.