Teenagers Different in the US and Korea

Teenagers in the US and Korea grow up in different environment. In addition, American teenagers have a stronger independent spirit because they are independent from their parents earlier. However, Korean teenagers do not get an independent spirit from their parents early. But some teenagers become independent from their parents. Moreover, Korean teenagers cause many problems, related to their smoking, drinking, and using drugs. Sometimes they behave violently. It is called a juvenile delinquency. However, I think American teenagers do less than Korean teenagers. American teenagers are exposed to violence more than Korean teenagers. So, Korea has to have more protection of teenagers.