Health behavior considered unhealthy or result in health disparities: marijuana usage among college aged individuals

write an essay on a health behavior that is considered unhealthy or likely to result in health problems for college aged individuals. Specifically write about marijuana usage among college aged individuals.
Describe in seperate sections as given in essay format:

Introduction: State the purpose of the paper

Section 1: The health risks from engaging in the behavior for college aged individuals

Section 2: Reasons why some college aged students engage in this behavior

Section3: Health behavior studies that have influenced college aged students to change their unhealthy behavior

Conclusion: Summarize key points