The Harmful Effects Of Marijuana Marijuana is one of the most harmful drugs, but yet it's one of the most frequently used drugs, does that sound right? Last year in the United States, nearly 69 million people over the age of 12 have tried marijuana at least once. The scary thing is, do they really know about the harmful effects? There are both long-term and immediate effects such as cancer(a huge killer in the world), increased …showed first 75 words of 881 total…

…showed last 75 words of 881 total…in that way, but people are destroyed mentally. A recent study showed that in California, scientists examined health status of 450 daily smokers of marijuana but not tobacco. They found that the marijuana smokers had more sick days and more doctor visits for respiratory problems and other types of illness than did a similar group who did not smoke either substance. This fact shows that marijuana does indeed cause illness, and it needs to be stopped.