It's not just what's in the blunt or bong that's a problem. Getting high is risky in a lot of ways - and not just medically.
Intoxication compromises mental functioning by affecting memory and learning. Students who smoke are more likely to skip class, not turn in assignments, get poor grades, and drop out. If you choose to get high, you're less likely to complete your degree. These learning and memory issues can persist for more than 24 hours after use, so getting high on Saturday night might impact your performance in class on Monday.
Getting high also affects your motor coordination and perception of sights, sounds, time, and touch. This means that you're more likely to get into a car accident than if you were sober.
Also, lowered inhibitions often means poor decision-making. Some common things include unplanned and unprotected sex, doing things you'd never do sober, and relationship problems.
Laws in some states permit the use of marijuana for medical purposes. This is because THC - the active ingredient - is powerful enough to help treat the symptoms of glaucoma and reduce nausea in patients with HIV/AIDS or cancer. Indiana is not one of these states. Federal law considers marijuana as Schedule I Controlled Substance not widely accepted for medical use. As a University, USI is required to follow federal laws regarding marijuana.
If one of your friends is using marijuana, you probably already know if there is a problem. Don't blow it off - if you're concerned, there is a good reason you feel that way. Learn how to talk to your friend about his/her use.