The document discusses causes and health dangers of teen obesity, including poor nutrition from excessive soda consumption and lack of physical activity, which can lead to shorter life expectancy, diabetes, heart disease, and some cancers. It provides ways for teens to eat healthier by reducing junk food and packing healthy lunches, as well as increasing physical activity through reducing indoor time and spending at least 60 minutes daily in moderate activity with friends. Developing healthy habits can result in healthy people.