People will start to distance themselves and often not talk
Explanation:
If a person is self harming, they most likely don't want another person knowing about it. They will start to distance themselves from you or the group and wear long clothing for example pants and long sleeves no matter the weather.
Styrofoam is poisonous when burned and it takes thousands of years to decompose card bord is biodegradable and probably won't give you cancer if u accidently eat some