1. Paul and Anne Ehrlich argue in The Population Explosion (1990) that a baby born in a developed country poses a greater threat to sustainability than a baby born in a developing country because people in developed countries place much higher demands on the world's supply of energy, food, and other limited resources. Do you agree with this view?

2. Name a country other than Egypt that has high physiological and agricultural densities.

3. In what climate zone are most of the countries that have experienced cholera recently?

4. Why do men have lower life expectancies than women in most countries?

5. Should the United States admit more or fewer immigrants for family reunification, or for job skills, or by random lottery?