HELPP Rain forests are often cleared to provide land for farming. Which of these outcomes is the most
immediate effect of this practice on the global environment?
A. An increase in acid rain
B. Depletion of the ozone layer
C. The decreased production of food
D. An increase in atmospheric carbon dioxide levels

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population