This document discusses mental health and substance abuse. It defines mental health as achieving a balance between one's drives and defines characteristics of mentally healthy people. It describes the prevalence of mental illness worldwide and lists common types like schizophrenia and neuroses. The causes of mental illness include organic, hereditary, social and environmental factors. The document outlines prevention, treatment and services for mental health as well as programs for substance abuse issues like alcohol and drug dependence. It provides information on commonly abused drugs and their effects while also discussing prevention and rehabilitation approaches.