The document discusses the causes and effects of obesity. It defines obesity as having excess body fat that negatively impacts health. Common causes of obesity include overeating, inactivity, genetic factors, and certain medications. Obesity is measured using body mass index (BMI) and is a growing problem worldwide. Health risks of obesity include high blood sugar, high blood pressure, high cholesterol, and increased risk of heart attack. Prevention strategies involve eating a healthy diet, avoiding fast food and inactivity, and exercising regularly.