Uncivilized slogan screen on English campus

At school, students often litter, because they don't think it is necessary to throw rubbish into the dustbin. This has caused environmental pollution. The best way to solve this problem is to tell children what happens when they litter, and let them pick up their rubbish every time they see them littering. Another problem is doing dangerous things. Children often want to show off, so they will do some extreme activities, which mostly happens in high school. The best way to solve this problem is to teach them and tell them what will happen if they continue.