How much should an adult exercise?
1. Why do some experts think exercise is more important than weight?
2. What are the trends in adult weight in the United States?
3. How does lung cancer reflect trends in smoking cigarettes?
4. Which groups are smoking more, and which groups are smoking less?
5. Why would SES predict health, even in a nation with free, public health care?
6. If an adult lived in another nation, would he or she be smarter? And, because of that, would that adult live longer and healthier?