Is smoking marijuana bad? My sister says it isn't.
Your sister is misinformed
No, it's not bad for you. Wait...it IS bad. I'm not sure, I'm a little confused right now. Wait...there's an egg frying on my brain. When it's done, I'll tell you.
Of course it's bad, that's why it's illegal.
Of course it is bad. Back in the day I dated a guy who smoked it. He went to the dentist and the dentist told him he could tell he did by the amount of tar built up on the back of his throat. If it is on his throat, don't you think it would be in his lungs as well? Anything taken into you lungs, other than fresh air can damage them.
It is, regardless of what the stoner scientists keep saying. However, once in a while is okay. You just have to give your body time to clean itself and not stack up on toxins and tar.
It honestly depends on WHY the person is smoking marijuana.
If it's for medical reasons, with a doctor's prescription … it can be beneficial.
If it's just recreational use … it's just stupid. So is doing any drug or alcohol to "disconnect" with reality.
Smoking alone is harmful. Marijuana on the other hand... A lot of people say it's not bad and it's a miracle drug. I disagree. Anything that gives you a "high" feeling cannot be not harmful.