Can someone tell me if smoking marihuana is bad for you?

It can be: Depnding on your own health status (both physical and mental) and how much you smoke. Just like alcohol being bad for you if you drink 10 drinks a day, but not if you have one or two drinks several times a week. In teenagers, it has greater effects on the brain and can cause more damage, and this may be true in older people as well.Heavy use can cause addiction and lung problems, social use less.