Childhood obesity is discussed in two parts: poor nutrition and inactive lifestyle. Part 1 explains that energy-dense foods high in fat and sugar but low in nutrients make up a major part of daily routines. The CDC recommends focusing on healthy foods in moderation and portion control. Part 2 discusses how technology increases sedentary time and the invention of cars led to fast food. Inactivity is a leading cause of heart disease. The article recommends limiting screen time, promoting outdoor activities, and parents being role models for physical activity.